Sonic the Hedgehog series
Encyclopedia
Sonic the Hedgehog is the best selling video game series released by Sega
Sega
, usually styled as SEGA, is a multinational video game software developer and an arcade software and hardware development company headquartered in Ōta, Tokyo, Japan, with various offices around the world...

 starring and named after its mascot
Mascot
The term mascot – defined as a term for any person, animal, or object thought to bring luck – colloquially includes anything used to represent a group with a common public identity, such as a school, professional sports team, society, military unit, or brand name...

 character, Sonic the Hedgehog
Sonic the Hedgehog (character)
, trademarked Sonic The Hedgehog, is a video game character and the main protagonist of the Sonic video game series released by Sega, as well as in numerous spin-off comics, cartoons, and a feature film. The first game was released on June 23, 1991, to provide Sega with a mascot to rival Nintendo's...

. The series began in 1991 with the release of Sonic the Hedgehog on the Sega Mega Drive/Genesis, which was responsible for turning Sega into a leading video game company during the 16-bit era

The Sega division responsible for the first game in the series was called Sonic Team
Sonic Team
is a Japanese computer and video game developer established in Ōta, Tokyo, Japan in 1990, originally known as Sega AM8. The Japan-based division is also known as G.E. Department Global Entertainment. The studio has collaborated with several in-house Japanese studios as well as other American-based...

, and the group has since developed many titles in the franchise. Prominent members of its initial staff included programmer Yuji Naka
Yuji Naka
, is a video game designer and programmer, best known as the former head of Sonic Team, a group of Sega programmers/designers, where he was the lead programmer of the original Sonic the Hedgehog....

, designer Naoto Ohshima
Naoto Ohshima
is a Japanese national and former Sega employee who designed and created the characters of Sonic the Hedgehog and Dr. Eggman. However, Yuji Naka and Hirokazu Yasuhara often get the credit for his work on the Sonic series, because of their close association with the Sonic name...

 and game planner Hirokazu Yasuhara
Hirokazu Yasuhara
Hirokazu Yasuhara is a Japanese video game designer and Sonic Team's 2nd Assistant President.He designed the gameplay and stages of the majority of the initial Sonic the Hedgehog video games for Sega Mega Drive based on technical demos and engines coded by Yuji Naka and characters designed by...

. Other developers of Sonic games have included the American Sega Technical Institute, Japanese Dimps
Dimps
is an Osaka, Japan-based video game development studio with an additional office in Tokyo, Japan. Employing a staff of 218 people, it is known for developing such games as the Dragon Ball Z: Budokai trilogy for the PlayStation 2, and the Sonic the Hedgehog games specific to the Game Boy Advance and...

, Canadian BioWare
BioWare
BioWare is a Canadian video game developer founded in February 1995 by newly graduated medical doctors Ray Muzyka, Greg Zeschuk, and Augustine Yip. BioWare is currently owned by American company Electronic Arts...

, and British Traveller's Tales
Traveller's Tales
Traveller's Tales is an English software house founded in 1989 and fully established in 1990 and based in Knutsford, Cheshire.It is part of the TT Games group—after the merger of publisher Giant Interactive and the developer Traveller's Tales—along with TT Games Publishing...

. While the first games in the series were platform game
Platform game
A platform game is a video game characterized by requiring the player to jump to and from suspended platforms or over obstacles . It must be possible to control these jumps and to fall from platforms or miss jumps...

s, the series has expanded into other genres such as action-adventure
Action-adventure game
An action-adventure game is a video game that combines elements of the adventure game genre with various action game elements. It is perhaps the broadest and most diverse genre in gaming, and can include many games which might better be categorized under narrow genres...

, fighting
Fighting game
Fighting game is a video game genre where the player controls an on-screen character and engages in close combat with an opponent. These characters tend to be of equal power and fight matches consisting of several rounds, which take place in an arena. Players must master techniques such as...

, racing, role-playing
Role-playing video game
Role-playing video games are a video game genre with origins in pen-and-paper role-playing games such as Dungeons & Dragons, using much of the same terminology, settings and game mechanics. The player in RPGs controls one character, or several adventuring party members, fulfilling one or many quests...

, and sports
Sports game
A sports game is a computer or video game that simulates the practice of traditional sports. Most sports have been recreated with a game, including team sports, athletics and extreme sports. Some games emphasize actually playing the sport , whilst others emphasize strategy and organization...

.

Premise

Nearly all games in the series feature a blue hedgehog named Sonic
Sonic the Hedgehog (character)
, trademarked Sonic The Hedgehog, is a video game character and the main protagonist of the Sonic video game series released by Sega, as well as in numerous spin-off comics, cartoons, and a feature film. The first game was released on June 23, 1991, to provide Sega with a mascot to rival Nintendo's...

 as the central player character
Player character
A player character or playable character is a character in a video game or role playing game who is controlled or controllable by a player, and is typically a protagonist of the story told in the course of the game. A player character is a persona of the player who controls it. Player characters...

 and protagonist
Protagonist
A protagonist is the main character of a literary, theatrical, cinematic, or musical narrative, around whom the events of the narrative's plot revolve and with whom the audience is intended to most identify...

. The games detail Sonic and his allies' attempt to save the world from various threats, primarily the evil genius Dr. Ivo "Eggman" Robotnik
Doctor Eggman
, also known by his alias , is a fictional video game character, the main antagonist of the Sonic the Hedgehog series created by Sega. Dr. Eggman is a rotund, mad scientist with an IQ of 300 who plans to conquer the world in order to build his Eggman Empire and is the archenemy of Sonic the Hedgehog...

, the main antagonist
Antagonist
An antagonist is a character, group of characters, or institution, that represents the opposition against which the protagonist must contend...

 of the series. Robotnik's aim is to rule the Earth; to achieve this, he usually attempts to eliminate Sonic and to acquire the powerful Chaos Emeralds.

Sega Mega Drive and add-on systems (1991–1996)

The first Sonic game, titled Sonic the Hedgehog, was a platform game
Platform game
A platform game is a video game characterized by requiring the player to jump to and from suspended platforms or over obstacles . It must be possible to control these jumps and to fall from platforms or miss jumps...

 released in 1991 that featured protagonist Sonic running through the game's levels in order to foil Doctor Robotnik's attempt to take over the world. The game focused Sonic's ability to run and to jump at high speeds with the use of springs, slopes, and loop-the-loops. Its sequel, Sonic the Hedgehog 2
Sonic the Hedgehog 2 (16-bit)
Sonic the Hedgehog 2 is a 16-bit 1992 platform video game that was developed by Sonic Team members working at the Sega Technical Institute, and published by Sega for the Sega Genesis console. It was released in Japan on November 21, 1992 and in North America and Europe on November 24, 1992...

, a platform game released in 1992, increased the overall size and speed of the series' gameplay and was the second best-selling Genesis game of all time. The game introduced Sonic's sidekick, Miles "Tails" Prower
Miles "Tails" Prower
, better known by his nickname , is a character, as well as the main deuteragonist in the Sonic the Hedgehog series of video games, comics, animated series and film released by Sega....

, who followed Sonic throughout the game, and the "spin dash" maneuver, which allowed Sonic to boost forwards quickly when stopped. The next sequel, Sonic the Hedgehog 3
Sonic the Hedgehog 3
Sonic the Hedgehog 3 is a 1994 platform video game in the Sonic the Hedgehog series for the Sega Mega Drive/Genesis. It was developed in the United States by members of Sonic Team working at Sega Technical Institute, and was published by Sega, debuting worldwide in the first half of 1994...

, was a third platform game in the Sonic series released in 1994. The game introduced a temporary shield maneuver, added new shield types to the series, and allowed Tails to fly under a player's control. It also introduced a new character, Knuckles the Echidna
Knuckles the Echidna
Knuckles the Echidna is a video game character of the Sonic the Hedgehog game series, including spin-off games and comics. His first appearance was in Sonic the Hedgehog 3, released in 1994 to introduce a new rival for Sonic. He was presented as an antagonist who was tricked by Dr. Eggman into...

, who served as an additional antagonist with Doctor Robotnik for the game. Sonic & Knuckles
Sonic & Knuckles
Sonic & Knuckles is a 1994 platform video game in the Sonic the Hedgehog series for the Sega Mega Drive/Genesis. It was developed in the United States at Sega Technical Institute by members of Sonic Team, and was published by Sega worldwide on October 18, 1994.As well as working as a standalone...

, another platform game in the Sonic series, was released later in 1994. The game introduced Knuckles as a playable character with gliding and wall climbing abilities and allowed gamers to plug in Sonic the Hedgehog 3 to the top of the Sonic and Knuckles cartridge as part of the game's "lock on" functionality. This allowed gamers to play the game as it was originally intended; the games were intended to be one title, but were split due to space and time constraints.

There were several Sonic games for the Mega Drive that were not 2D
2D computer graphics
2D computer graphics is the computer-based generation of digital images—mostly from two-dimensional models and by techniques specific to them...

 platform games. Sonic the Hedgehog Spinball
Sonic the Hedgehog Spinball
Sonic the Hedgehog Spinball is an adventure pinball game in the Sonic the Hedgehog series. It was originally released for the Sega Mega Drive/Genesis in 1993 and later ported to the Game Gear and Master System in 1995.The game title is a pun on pinball and Sonic's famous spin dash move...

, released in 1993, was a pinball
Pinball
Pinball is a type of arcade game, usually coin-operated, where a player attempts to score points by manipulating one or more metal balls on a playfield inside a glass-covered case called a pinball machine. The primary objective of the game is to score as many points as possible...

 simulation modeled after the Spring Yard and Casino Night Zones from the first two Sonic games. The game, unlike general pinball simulations, had an overall goal of collecting all the Chaos Emeralds in each level and defeating the levels' bosses. It was one of the few video games that had elements from the cartoons Sonic the Hedgehog
Sonic the Hedgehog (TV series)
Sonic the Hedgehog: The Animated Series is an American animated series produced by DIC Entertainment with the partnership of Sega of America and was based on the Sonic the...

 and Adventures of Sonic the Hedgehog
Adventures of Sonic the Hedgehog
The Adventures of Sonic the Hedgehog is an American animated series that was first broadcast in September 1993, and only for one season...

. Dr. Robotnik's Mean Bean Machine
Dr. Robotnik's Mean Bean Machine
-External links:* at Game Rankings* at The Internet Movie Database...

 was a puzzle game similar to Puyo Puyo
Puyo Puyo
is the inaugural game in the Puyo Puyo series originally released in 1991 by Compile for the MSX2. Since its creation, it uses characters from . It was created by Masamitsu "Moo" Niitani, the founder of Compile, who was inspired by certain elements from the Tetris and Dr...

 that was set in the Adventures of Sonic the Hedgehog universe. Sonic 3D Blast
Sonic 3D Blast
Sonic 3D is an isometric platform game in the Sonic the Hedgehog series. It was developed in the United Kingdom by Traveller's Tales and published by Sega. The Japanese version was also Sega Saturn exclusive...

, an isometric
Isometric projection
Isometric projection is a method for visually representing three-dimensional objects in two dimensions in technical and engineering drawings...

, 2.5D
2.5D
2.5D , 3/4 perspective and pseudo-3D are terms used to describe either:* 2D graphical projections and techniques which cause a series of images or scenes to fake or appear to be three-dimensional when in fact they are not, or* gameplay in an otherwise three-dimensional video game that is...

 platform game released in 1996 and developed by Traveller's Tales
Traveller's Tales
Traveller's Tales is an English software house founded in 1989 and fully established in 1990 and based in Knutsford, Cheshire.It is part of the TT Games group—after the merger of publisher Giant Interactive and the developer Traveller's Tales—along with TT Games Publishing...

, featured Sonic running through pseudo-3D environments while trying to rescue Flickies
Flicky
Flicky is an arcade game made by Sega. First released in arcades in 1984, Flicky was also released at the time for the SG-1000, and then ported to the MSX and Japanese computers Sharp X1, Fujitsu FM-7 and NEC PC-8801. It was later ported to the Sega Mega Drive/Genesis in 1991...

 from Doctor Robotnik.

The Sega Mega Drive/Genesis had "add-on" systems that incorporated Sonic titles. Sonic CD, released for the Mega-CD/Sega CD, was a 2D platform game released in 1993. The game introduced the character Amy Rose
Amy Rose
, known earlier as Rosy the Rascal, is a video game character who appears in most of the Sonic the Hedgehog series of video games developed by Sega's Sonic Team, debuting in Sonic CD as the third recurring protagonist. Amy Rose was created by Kazuyuki Hoshino and based on one of Kenji Terada's...

 and featured levels that differed depending upon whether Sonic was in the past, present, or future time frames. Knuckles Chaotix, a spin-off
Spin-off (media)
In media, a spin-off is a radio program, television program, video game, or any narrative work, derived from one or more already existing works, that focuses, in particular, in more detail on one aspect of that original work...

 released in 1995 for the Sega 32x
Sega 32X
The Sega 32X, codenamed Project Mars, is an add-on for the Mega Drive/Genesis video game console by Sega. Its aim was to increase the lifespan of the aging Mega Drive/Genesis system, which was facing stiff competition from the SNES...

, featured Knuckles and a new group named Chaotix fighting against Dr. Robotnik. The game featured a two-player cooperative system in which the on-screen characters were connected by magic rings. There was also Sonic Eraser
Sonic Eraser
Sonic Eraser was a puzzle video game that was available to owners of the Sega Meganet, a modem for the Sega Mega Drive in Japan. Other than his sprite, there is little that relates the game with the rest of the Sonic franchise....

, a puzzle game released exclusively on Meganet
MegaNet
The or is Japan's only network of multi-lingual commercial radio stations. Currently all such stations are members of the network. The flagship station is InterFM in Tokyo.They all broadcast in FM...

.

Sega Master System and Game Gear (1991–1996)

Due to the success of Sonic games on the Mega Drive/Genesis
Sega Mega Drive
The Sega Genesis is a fourth-generation video game console developed and produced by Sega. It was originally released in Japan in 1988 as , then in North America in 1989 as Sega Genesis, and in Europe, Australia and other PAL regions in 1990 as Mega Drive. The reason for the two names is that...

, the series was introduced to the Sega Master System
Sega Master System
The is a third-generation video game console that was manufactured and released by Sega in 1985 in Japan , 1986 in North America and 1987 in Europe....

 and Sega Game Gear
Sega Game Gear
The was Sega's first handheld game console. It was the third commercially available color handheld console, after the Atari Lynx and the TurboExpress....

. Sega began by releasing Sonic the Hedgehog
Sonic the Hedgehog (8-bit)
The game's soundtrack was composed by chiptune musician Yuzo Koshiro. He adapted several pieces of music from the original 16-bit version, while the rest of the soundtrack consisted of his own original music. One of his original pieces, the "Bridge Zone" theme, was later sampled in Janet Jackson's...

, a 2D
2D computer graphics
2D computer graphics is the computer-based generation of digital images—mostly from two-dimensional models and by techniques specific to them...

 platform game
Platform game
A platform game is a video game characterized by requiring the player to jump to and from suspended platforms or over obstacles . It must be possible to control these jumps and to fall from platforms or miss jumps...

, in 1991. The game featured Sonic's ability to run and to jump at high speeds like its Mega Drive/Genesis counterpart but with notably different level design
Game design
Game design, a subset of game development, is the process of designing the content and rules of a game in the pre-production stage and design of gameplay, environment, storyline, and characters during production stage. The term is also used to describe both the game design embodied in a game as...

 and music. Sega later released Sonic the Hedgehog 2
Sonic the Hedgehog 2 (8-bit)
Sonic the Hedgehog 2 is a 8-bit 1992 side-scrolling platform handheld console video game developed by Aspect Co., Ltd. and released by Sega for their Master System and Game Gear formats. The Master System version was released in Europe on October 16, 1992...

 another 2D platform game
Platform game
A platform game is a video game characterized by requiring the player to jump to and from suspended platforms or over obstacles . It must be possible to control these jumps and to fall from platforms or miss jumps...

, in 1992. The game differed from its Mega Drive/Genesis counterpart with different levels and music and by not including a "spin dash" maneuver. It also featured a different storyline in which Doctor Robotnik kidnaps Tails, who is non-playable in the Master System/Game Gear version. Sonic Chaos/Sonic and Tails (Japan)
Sonic Chaos
Sonic Chaos is a platform game for the Sega Master System and Sega Game Gear, developed by Aspect and published by Sega in 1993...

, released in 1993, was similar to the earlier two Sega Master System/Game Gear Sonic games, but featured Tails as a playable character. A sequel, Sonic Triple Trouble/Sonic and Tails 2 (Japan)
Sonic Triple Trouble
Sonic the Hedgehog: Triple Trouble is a platform video game in the Sonic the Hedgehog series, for the Sega Game Gear. It was developed by Aspect and published by Sega in 1994. It is the sequel to Sonic Chaos, which was the first Sonic & Tails game in Japan...

, a 2D platform game, was released in 1994 for the Game Gear and introduced a new character, Nack the Weasel, who, along with Knuckles and Doctor Robotnik, raced to collect the Chaos Emeralds. One of the last games for the Sega Game Gear, Sonic Blast
Sonic Blast
Sonic Blast is a video game in the Sonic the Hedgehog series developed by Aspect and published by Sega for the Sega Game Gear. It is known as G Sonic in Japan. It was released in December 1996 for both North American and European markets...

, was released in 1996 and featured prerendered sprites.

Several spin-off Sonic games were released for the Sega Master System/Game Gear that were not 2D platform games. Sonic Labyrinth
Sonic Labyrinth
Sonic Labyrinth is a puzzle-come-platform game for the Sega Game Gear, released 17 November 1995 in Japan and in 1995 in North America and Europe. It is also playable on Sonic Adventure DX and in the PC, PlayStation 2 and Xbox editions of Sonic Mega Collection Plus. The game features isometric 3D...

, released for Game Gear in 1995, featured an isometric view and slower exploration-based gameplay that resulted from Robotnik's replacing Sonic's shoes with "Speed Down Boots." Sonic Drift
Sonic Drift
The Sonic Drift games were a series of two racing games that featured characters from the Sonic the Hedgehog series. It was released for the Sega Game Gear in 1994 and 1995 respectively, and later re-released many years later in several other compilations.-Sonic Drift:Sonic Drift is a kart racing...

 was a kart racer released in 1994. It later had a sequel, Sonic Drift 2, which was released in 1995. Tails also received two spin-offs. Tails' Skypatrol
Tails' Skypatrol
is a platform/adventure video game in the Sonic the Hedgehog series, developed by JSH and published by Sega for Sega Game Gear. It was originally released on April 28, 1995 as an exclusive game to the Japanese market...

, released in 1995, allowed players to control an always-flying Tails. Tails Adventure
Tails Adventure
, also known as Tails Adventures, is an action-adventure video game with role-playing elements that was developed by Aspect and distributed by Sega in 1995 for the videogame console Sega Game Gear....

, released in 1995, featured a mix of platforming and RPG
Role-playing video game
Role-playing video games are a video game genre with origins in pen-and-paper role-playing games such as Dungeons & Dragons, using much of the same terminology, settings and game mechanics. The player in RPGs controls one character, or several adventuring party members, fulfilling one or many quests...

 elements.

Sega Saturn (1996–1997)

Few Sonic games were released for the Sega Saturn
Sega Saturn
The is a 32-bit fifth-generation video game console that was first released by Sega on November 22, 1994 in Japan, May 11, 1995 in North America, and July 8, 1995 in Europe...

, and none were a standard platform game originally made for the system. Sonic 3D was released in 1996 alongside the Mega Drive version. Like its Mega Drive counterpart, the Saturn edition used isometric
Isometric projection
Isometric projection is a method for visually representing three-dimensional objects in two dimensions in technical and engineering drawings...

, 2.5D
2.5D
2.5D , 3/4 perspective and pseudo-3D are terms used to describe either:* 2D graphical projections and techniques which cause a series of images or scenes to fake or appear to be three-dimensional when in fact they are not, or* gameplay in an otherwise three-dimensional video game that is...

 graphics, but it added FMV cut-scenes
Full motion video
Full motion video based games are video games that rely upon pre-recorded TV-quality movie or animation rather than sprites, vectors, or 3D models to display action in the game. In the early 1990s a diverse set of games utilized this format...

, enhanced music and visual effects, and a real-time 3D special stage. Sonic Jam, a compilation released for the Saturn in 1997, contained the original Sonic the Hedgehog, Sonic the Hedgehog 2, Sonic the Hedgehog 3, and Sonic & Knuckles, as well as a "Sonic World" mode, which allowed the player to control Sonic in a small 3D world. The Sonic World was mainly a means of accessing the disc's multimedia features, which included character artwork, the soundtrack, and Japanese Sonic videos. Sonic R
Sonic R
Sonic R is a racing game developed by Traveller's Tales and Sonic Team for the Sega Saturn and PC, the latter version being ported to the GameCube and the PlayStation 2 in Sonic Gems Collection. It features characters from the Sonic the Hedgehog series...

, a foot racing spin-off and also the Sonic series' first fully 3D game, was released in 1997 for the Saturn and ported to the PC in 1998.

The Sega Technical Institute attempted to develop a Sonic game for the Saturn called Sonic X-treme
Sonic X-treme
Sonic X-treme is a canceled platform video game in the Sonic the Hedgehog series. Early version were considered for several systems until ending up as being developed by Sega for the Sega Saturn, with the intended release being around Christmas of 1996. However, after getting stuck in development...

. It was originally intended to compete with Nintendo's
Nintendo
is a multinational corporation located in Kyoto, Japan. Founded on September 23, 1889 by Fusajiro Yamauchi, it produced handmade hanafuda cards. By 1963, the company had tried several small niche businesses, such as a cab company and a love hotel....

 Super Mario 64
Super Mario 64
is a platform game, published by Nintendo and developed by its EAD division, for the Nintendo 64. Along with Pilotwings 64, it was one of the launch titles for the console. It was released in Japan on June 23, 1996, and later in North America, Europe, and Australia. Super Mario 64 has sold over...

 and Sony's
Sony
, commonly referred to as Sony, is a Japanese multinational conglomerate corporation headquartered in Minato, Tokyo, Japan and the world's fifth largest media conglomerate measured by revenues....

 Crash Bandicoot. However, due to time constraints and issues between STI, the Japanese division of Sega, and Sonic Team
Sonic Team
is a Japanese computer and video game developer established in Ōta, Tokyo, Japan in 1990, originally known as Sega AM8. The Japan-based division is also known as G.E. Department Global Entertainment. The studio has collaborated with several in-house Japanese studios as well as other American-based...

, the project was canceled in the latter months of 1996.

Dreamcast (1998–2001)

Sega Dreamcast sales begin to decline after the launch of the PlayStation 2
PlayStation 2
The PlayStation 2 is a sixth-generation video game console manufactured by Sony as part of the PlayStation series. Its development was announced in March 1999 and it was first released on March 4, 2000, in Japan...

; and therefore few Sonic games were released for the system. Sonic Adventure
Sonic Adventure
is a 1999 platform video game developed by Sonic Team and released on December 23, 1998, in Japan by Sega for the Dreamcast. One of its development titles was Sonic RPG...

, then a launch title for the Dreamcast, was released in December 1998 in Japan and September 1999 in North America. The game was the first in the series to feature voice acting. Sonic Adventure was re-released for the GameCube and PC
Personal computer
A personal computer is any general-purpose computer whose size, capabilities, and original sales price make it useful for individuals, and which is intended to be operated directly by an end-user with no intervening computer operator...

 as Sonic Adventure DX: Director's Cut in 2003 and, in late 2010, ported to Xbox Live Arcade
Xbox Live Arcade
Xbox Live Arcade is a type of video game download distribution available primarily in a section of the Xbox Live Marketplace, Microsoft's digital distribution network for the Xbox 360, that focuses on smaller downloadable games from both major publishers and independent game developers...

 and PlayStation Network. Its sequel, Sonic Adventure 2, was released for the Dreamcast in 2001 in North America, and was ported to the GameCube as Sonic Adventure 2: Battle in 2002, featuring several enhancements to the Dreamcast version.

The other Sonic game released for the Dreamcast was Sonic Shuffle
Sonic Shuffle
is a video game for the Dreamcast and was Sega's answer to the Nintendo party game, Mario Party. The game was developed by Hudson Soft, who also developed Mario Party, and co-developed by Sonic Team.-Overview:...

, a board game released in 2000 that was very similar to the Mario Party series and featured cel-shaded graphics.

During the period of the Dreamcast, another Sonic game was released on SNK's
SNK Playmore
SNK Playmore Corporation is a Japanese video game hardware and software company. SNK is an acronym of , which was SNK's original name. The company's legal and trading name became SNK in 1986....

 Neo Geo Pocket Color
Neo Geo Pocket Color
The Neo Geo Pocket Color , is a 16-bit colour handheld game console by SNK. It was the last console they produced in the Neo Geo family...

 portable console, Sonic the Hedgehog Pocket Adventure
Sonic the Hedgehog Pocket Adventure
Sonic the Hedgehog Pocket Adventure is a video game in the Sonic the Hedgehog series. It was released in 1999 for the Neo Geo Pocket Color handheld game console...

.

Game Boy Advance (2001–2004)

Sonic's transition to the Game Boy Advance
Game Boy Advance
The is a 32-bit handheld video game console developed, manufactured, and marketed by Nintendo. It is the successor to the Game Boy Color. It was released in Japan on March 21, 2001; in North America on June 11, 2001; in Australia and Europe on June 22, 2001; and in the People's Republic of China...

 was completed with Sonic Advance
Sonic Advance
is a platform game in the Sonic the Hedgehog series, developed by Dimps, published by Sega , by THQ and by Infogrames for Game Boy Advance. It was released in Japan on December 20, 2001, in North America on February 4, 2002 and finally in Europe on March 23, 2002...

, the first original Sonic title released for a Nintendo console. The game featured 2D platforming, similar to the original Genesis titles, and new gameplay mechanics from more recent Sonic titles as well, such as grinding on rails. It was released in late 2001 in Japan and early 2002 elsewhere, and ported to Nokia
Nokia
Nokia Corporation is a Finnish multinational communications corporation that is headquartered in Keilaniemi, Espoo, a city neighbouring Finland's capital Helsinki...

's N-Gage
N-Gage
The N-Gage is a mobile telephone and handheld game system by Nokia, based on the Nokia Series 60 platform, released in October 2003. It began sales on October 7, 2003. The N-Gage QD replaced the original N-Gage in 2004....

 on October 7, 2003, as SonicN. Two sequels, Sonic Advance 2
Sonic Advance 2
is a side-scrolling platform game in the Sonic the Hedgehog series, developed by Dimps and published by THQ for the Game Boy Advance. The game was released in Japan on December 19, 2002, in North America on March 9, 2003, in Europe on March 18, 2003...

 and Sonic Advance 3
Sonic Advance 3
is a platform game in the Sonic the Hedgehog series, developed by Dimps, Sega and Sonic Team and published by THQ for the Game Boy Advance and the final installment of the Sonic Advance series. It was first released in North America on June 7, 2004, later in Japan on June 17, 2004 and then in...

, followed in March 2003 and June 2004, respectively.

Between Sonic Advance 2 and Sonic Advance 3, two other Sonic games were released: Sonic Battle
Sonic Battle
Sonic Battle is a fighting game developed by Sonic Team and published by Sega and THQ for the Nintendo Game Boy Advance. It is the second fighting game in the Sonic the Hedgehog series, the first game being Sonic the Fighters...

, a 3D fighting game
Fighting game
Fighting game is a video game genre where the player controls an on-screen character and engages in close combat with an opponent. These characters tend to be of equal power and fight matches consisting of several rounds, which take place in an arena. Players must master techniques such as...

, and Sonic Pinball Party
Sonic Pinball Party
Sonic Pinball Party is a video game released for Game Boy Advance in 2003. It is a celebration of sorts for Sonic Team featuring many references to its previous games, mostly Sonic.-Story:...

, a pinball simulation.

GameCube, PlayStation 2, Xbox (2002–2006)

After the Dreamcast, Sega ceased producing its own video game hardware, focusing solely on manufacturing software for the Nintendo GameCube
Nintendo GameCube
The , officially abbreviated to NGC in Japan and GCN in other regions, is a sixth generation video game console released by Nintendo on September 15, 2001 in Japan, November 18, 2001 in North America, May 3, 2002 in Europe, and May 17, 2002 in Australia...

, followed by releases for the PlayStation 2
PlayStation 2
The PlayStation 2 is a sixth-generation video game console manufactured by Sony as part of the PlayStation series. Its development was announced in March 1999 and it was first released on March 4, 2000, in Japan...

 and Xbox
Xbox
The Xbox is a sixth-generation video game console manufactured by Microsoft. It was released on November 15, 2001 in North America, February 22, 2002 in Japan, and March 14, 2002 in Australia and Europe and is the predecessor to the Xbox 360. It was Microsoft's first foray into the gaming console...

.

The first game released for the GameCube was Sonic Adventure 2: Battle, followed by Sonic Adventure DX: Director's Cut, each ports from the Dreamcast. Sega later released Sonic Heroes
Sonic Heroes
is a 2004 platforming single-player/multiplayer video game in the Sonic the Hedgehog series developed by Sonic Team USA. It is the first multiplatform title in the Sonic series, developed for Nintendo GameCube, PlayStation 2 and Xbox and released in Japan in December 2003, in North America in...

, the first Sonic game made for the GameCube, PlayStation 2, and Xbox. It was released on all three systems on December 30, 2003 in Japan, with American and European releases following soon after. The game was similar to that of the Adventure games, although the player now controlled the lead character of a team of three, with the other two following behind. The player could then switch to a new leader at any time in order to use that character's special abilities.

Shadow the Hedgehog
Shadow the Hedgehog (video game)
Shadow the Hedgehog is a 2005 video game developed by Sega Studio USA, the former United States division of Sega's Sonic Team. Featuring the titular fictional character Shadow the Hedgehog from Sega's Sonic the Hedgehog series, the game was revealed at the March 2005 Walk of Game inauguration of...

 was released in late 2005 in North America. This game used a similar more advanced engine that Sonic Heroes
Sonic Heroes
is a 2004 platforming single-player/multiplayer video game in the Sonic the Hedgehog series developed by Sonic Team USA. It is the first multiplatform title in the Sonic series, developed for Nintendo GameCube, PlayStation 2 and Xbox and released in Japan in December 2003, in North America in...

 used. It focused on Shadow the Hedgehog
Shadow the Hedgehog
is a character from the Sonic the Hedgehog series. Shadow is an artificially-created life form. His trademark hover shoes propel him at extreme speeds that rival those of Sonic, and with a Chaos Emerald he has the ability to distort time and space using "Chaos Control." Often referred to as being...

 as he tried to uncover his past. The game contained multiple paths and endings, as the player chose to take good or evil paths for each level. It also added hand-held pistols and driving vehicles to 3D platforming.

Sonic Riders
Sonic Riders
is a video game spin-off produced by Sega and developed by Sonic Team in cooperation with NowPro, for the Nintendo GameCube, PlayStation 2, Xbox and PC. It is the fourth racing game in the Sonic the Hedgehog series, preceded by Sonic Drift, Sonic Drift 2 and Sonic R.The game was released to start...

 was the first Sonic racing game since Sonic R; in contrast to the previous title, the characters used hoverboards, bikes, and skates rather than racing on foot.

Due to the extended life cycle of the PlayStation 2, it also received ports of Sonic Riders: Zero Gravity
Sonic Riders: Zero Gravity
Sonic Riders: Zero Gravity released in Japan as , is a hoverboard racing video game published by Sega and developed by Sonic Team in cooperation with NowPro. It is the fifth racing game in the Sonic the Hedgehog series, following Sonic Drift, Sonic Drift 2, Sonic R and its predecessor, Sonic Riders...

 and Sonic Unleashed
Sonic Unleashed
Sonic Unleashed , is a video game and the 11th installment in the Sonic the Hedgehog series developed by Sonic Team and published by Sega for multiple platforms...

.

DS, PSP (2005–2010)

Two Sonic games appeared on the PlayStation Portable
PlayStation Portable
The is a handheld game console manufactured and marketed by Sony Corporation Development of the console was announced during E3 2003, and it was unveiled on , 2004, at a Sony press conference before E3 2004...

: Sonic Rivals
Sonic Rivals
Sonic Rivals is a game in the Sonic the Hedgehog series in late 2006. It is the first Sonic game developed by a Canadian company, Backbone Entertainment exclusively for the PlayStation Portable...

 and its sequel, Sonic Rivals 2
Sonic Rivals 2
Sonic Rivals 2 is the sequel to Sonic Rivals. The game was developed by Backbone Entertainment and supervised by Sega Studio USA, exclusively for the PlayStation Portable handheld videogame console. Sonic Rivals 2 was released on November 13, 2007 in North America...

. Both titles were 2.5D
2.5D
2.5D , 3/4 perspective and pseudo-3D are terms used to describe either:* 2D graphical projections and techniques which cause a series of images or scenes to fake or appear to be three-dimensional when in fact they are not, or* gameplay in an otherwise three-dimensional video game that is...

 style games.

There were a number of different Sonic games released for the Nintendo DS
Nintendo DS
The is a portable game console produced by Nintendo, first released on November 21, 2004. A distinctive feature of the system is the presence of two separate LCD screens, the lower of which is a touchscreen, encompassed within a clamshell design, similar to the Game Boy Advance SP...

. The first was Sonic Rush
Sonic Rush
is a 2005 platform handheld video game developed by Sonic Team and Dimps exclusively for the Nintendo DS as part of Sega's Sonic the Hedgehog series. It was released on November 15, 2005 in North America, November 18 in the PAL region, and November 23 in Japan. It is a 2D platform game, but Sonic's...

, released in 2005, featuring gameplay similar to the Sonic Advance series. It received a sequel, Sonic Rush Adventure
Sonic Rush Adventure
is a 2007 Sonic the Hedgehog platform game for the Nintendo DS videogame handheld, developed by Dimps and Sonic Team, published by Sega. Sonic the Hedgehog and Blaze the Cat return as playable characters, alongside a new, slightly hotheaded female raccoon named Marine the Raccoon...

, in 2007, which featured some additional new elements, such as the driving of jet skis and submarines. Sonic Colors
Sonic Colors
is a 2010 platforming game in the Sonic the Hedgehog series. It was first announced on May 26, 2010, in a press release by Sega for Italy, and it included a teaser trailer...

, released in November 2010, expanded further on the Rush series gameplay with the addition of the use of "Wisps", which gave Sonic various new power-ups and gimmicks.

Along with the Wii, the DS saw the beginning of the Mario and Sonic crossover games. The first, Mario & Sonic at the Olympic Games
Mario & Sonic at the Olympic Games
Mario & Sonic at the Olympic Games, known in Japan as , is a sports video game developed by the Sega Sports R&D Department of Sega Japan. It was published by Nintendo for Japan and by Sega for North America, Europe and all other regions. The game is officially licensed by the International Olympic...

, was released in late 2007, and featured characters from both series competing in Olympic-themed mini-games. Its sequel, Mario & Sonic at the Olympic Winter Games
Mario & Sonic at the Olympic Winter Games
is a 2009 sports video game developed by Sega. It was published by Nintendo for Japan and by Sega for North America and Europe. The game is officially licensed by the International Olympic Committee through exclusive license International Sports Multimedia...

, was released in October 2009, and featured an emphasis on winter-based sports.

Sonic Chronicles: The Dark Brotherhood
Sonic Chronicles: The Dark Brotherhood
Sonic Chronicles: The Dark Brotherhood is a Nintendo DS console role-playing game based on the Sonic the Hedgehog franchise, and developed by Canadian RPG developer BioWare as their first handheld video game project...

, a spin-off released in September 2008, was a turn-based role playing game developed by BioWare
BioWare
BioWare is a Canadian video game developer founded in February 1995 by newly graduated medical doctors Ray Muzyka, Greg Zeschuk, and Augustine Yip. BioWare is currently owned by American company Electronic Arts...

.

Wii, PlayStation 3, Xbox 360 (2006-present)

During this timeframe, Sega took the franchise in a number of different directions. First was Sonic the Hedgehog (2006 video game), which was released in November 2006 for the Xbox 360
Xbox 360
The Xbox 360 is the second video game console produced by Microsoft and the successor to the Xbox. The Xbox 360 competes with Sony's PlayStation 3 and Nintendo's Wii as part of the seventh generation of video game consoles...

 and December 2006 for the PlayStation 3
PlayStation 3
The is the third home video game console produced by Sony Computer Entertainment and the successor to the PlayStation 2 as part of the PlayStation series. The PlayStation 3 competes with Microsoft's Xbox 360 and Nintendo's Wii as part of the seventh generation of video game consoles...

. It continued in the Sonic Adventure direction, but was highly criticized for being sloppy and rushed for the launch window of both consoles. Sonic Unleashed
Sonic Unleashed
Sonic Unleashed , is a video game and the 11th installment in the Sonic the Hedgehog series developed by Sonic Team and published by Sega for multiple platforms...

 was released in 2008 for the Xbox 360, Wii, PS2 and PS3. While possessing the same name and rough themes, the Xbox 360 and PS3 versions were markedly different games than the Wii and PS2 versions.

While the prior game in the era continued the use of numerous playable characters and play styles, the following games would return to only have Sonic playable. Sonic the Hedgehog 4
Sonic the Hedgehog 4
is an episodic platform video game and a sequel in the Sonic the Hedgehog series. The game was developed by Dimps alongside members of Sonic Team and is intended to be inspired by and similar to the original Sonic the Hedgehog titles on the Sega Mega Drive/Genesis.Episode I was released in October...

, an episodic high-definition 2D game akin to the 16-bit Sonic games, was developed for the PlayStation Network, Xbox Live Arcade
Xbox Live Arcade
Xbox Live Arcade is a type of video game download distribution available primarily in a section of the Xbox Live Marketplace, Microsoft's digital distribution network for the Xbox 360, that focuses on smaller downloadable games from both major publishers and independent game developers...

, WiiWare
WiiWare
WiiWare is a service that allows Wii users to download games and applications specifically designed and developed for the Wii video game console made by Nintendo. These games and applications can only be purchased and downloaded from the Wii Shop Channel under the WiiWare section...

. Sonic Colors
Sonic Colors
is a 2010 platforming game in the Sonic the Hedgehog series. It was first announced on May 26, 2010, in a press release by Sega for Italy, and it included a teaser trailer...

 a game for the Wii, was released in November 2010. It introduced a power-up system in the form of alien beings called "Wisps". Sonic Generations
Sonic Generations
is a 2011 platform video game in the Sonic the Hedgehog series, produced by Sonic Team for PlayStation 3, Xbox 360, Microsoft Windows and Nintendo 3DS...

 is developed for Xbox 360, PS3, PC and Nintendo 3DS
Nintendo 3DS
The is a portable game console produced by Nintendo. The autostereoscopic device is able to project stereoscopic 3D effects without the use of 3D glasses or any additional accessories. The Nintendo 3DS features backward compatibility with Nintendo DS series software, including Nintendo DSi software...

 in November 2011, featuring both modern and classic interpretations of Sonic.

The franchise also moved into several new spin-off series during this time. One was the Storybook series, which combined Sonic gameplay with story and setting of famous books. Sonic and the Secret Rings
Sonic and the Secret Rings
is a video game developed by Sonic Team and published by Sega as part of the Sonic the Hedgehog series. It was released exclusively for the Wii on February 20, 2007 in North America; March 2 in Europe; and March 15 in Japan. It is the first Sonic game for the console, released in place of an...

, the first of two games in the sub-series, was released in spring 2007 and was exclusively developed for the Wii
Wii
The Wii is a home video game console released by Nintendo on November 19, 2006. As a seventh-generation console, the Wii primarily competes with Microsoft's Xbox 360 and Sony's PlayStation 3. Nintendo states that its console targets a broader demographic than that of the two others...

. The second, Sonic and the Black Knight
Sonic and the Black Knight
is a title within the Sonic the Hedgehog series, released exclusively on Wii as the second entry in the Sonic Storybook series, following on from Sonic and the Secret Rings. The game is directed by Tetsu Katano, who was the lead programmer of the Sonic Adventure titles and Sonic Heroes...

, was exclusively released in 2009 for the Wii. These games featured Sonic as the only playable character with 3D gameplay in an "on-rails situation, where Sonic was confined to a preset path.

Another spin-off series resulted in a collaboration with Nintendo
Nintendo
is a multinational corporation located in Kyoto, Japan. Founded on September 23, 1889 by Fusajiro Yamauchi, it produced handmade hanafuda cards. By 1963, the company had tried several small niche businesses, such as a cab company and a love hotel....

 and the Mario series
Mario (series)
The video game series, alternatively called the series or simply the series, is a series of highly popular and critically acclaimed video games by Nintendo, featuring Nintendo's mascot Mario and, in many games, his brother Luigi. Gameplay in the series often centers around jumping on and...

 of video games. The result was the Mario & Sonic olympic games series, where characters from the Sonic and Mario universes compete in olympic-themed minigames.
All three were released on the Wii; Mario & Sonic at the Olympic Games
Mario & Sonic at the Olympic Games
Mario & Sonic at the Olympic Games, known in Japan as , is a sports video game developed by the Sega Sports R&D Department of Sega Japan. It was published by Nintendo for Japan and by Sega for North America, Europe and all other regions. The game is officially licensed by the International Olympic...

 in November 2007, Mario & Sonic at the Olympic Winter Games
Mario & Sonic at the Olympic Winter Games
is a 2009 sports video game developed by Sega. It was published by Nintendo for Japan and by Sega for North America and Europe. The game is officially licensed by the International Olympic Committee through exclusive license International Sports Multimedia...

, in October 2009, and Mario & Sonic at the London 2012 Olympic Games
Mario & Sonic at the London 2012 Olympic Games
is a 2011 sports video game developed by Sega Japan. It was published by Nintendo for Japan and by Sega for North America, Europe, and all other regions. The game is officially licensed by the International Olympic Committee through exclusive licensee International Sports Multimedia...

 in November 2011. Separately from that series, Sega also collaborated with Nintendo to include Sonic the Hedgehog
Sonic the Hedgehog
Sonic the Hedgehog may refer to:* Sonic the Hedgehog , a video game series released by Sega starring its eponymous mascot** Sonic the Hedgehog , a video game character and the main protagonist of the Sonic video game series released by Sega** Sonic the Hedgehog , a 1991 platform game developed by...

 in their 2008 fighting game Super Smash Bros. Brawl
Super Smash Bros. Brawl
Super Smash Bros. Brawl, known in Japan as , often abbreviated as SSBB or simply as Brawl, is the third installment in the Super Smash Bros. series of crossover fighting games, developed by an ad hoc development team consisting of Sora, Game Arts and staff from other developers, and published by...

, for the Wii
Wii
The Wii is a home video game console released by Nintendo on November 19, 2006. As a seventh-generation console, the Wii primarily competes with Microsoft's Xbox 360 and Sony's PlayStation 3. Nintendo states that its console targets a broader demographic than that of the two others...

.

Sonic Free Riders
Sonic Free Riders
is a motion controlled racing video game in the Sonic the Hedgehog series. It is the third installment in the Sonic Riders series, following Sonic Riders: Zero Gravity. The game utilizes Microsoft's Kinect peripheral...

 was released in November 2010 as a follow-up to the Sonic Riders series, and was developed exclusively for Xbox 360's Kinect system. Also Sega Superstars Tennis
Sega Superstars Tennis
Sega Superstars Tennis is a tennis video game developed by Sumo Digital and published by Sega. The game was released on March 17, 2008 in Europe, on March 18, 2008 in North America, and on March 27, 2008 in Australia. The game includes 16 playable characters and 10 courts from Sega franchises...

 for the Wii
Wii
The Wii is a home video game console released by Nintendo on November 19, 2006. As a seventh-generation console, the Wii primarily competes with Microsoft's Xbox 360 and Sony's PlayStation 3. Nintendo states that its console targets a broader demographic than that of the two others...

, Xbox 360
Xbox 360
The Xbox 360 is the second video game console produced by Microsoft and the successor to the Xbox. The Xbox 360 competes with Sony's PlayStation 3 and Nintendo's Wii as part of the seventh generation of video game consoles...

, PlayStation 3
PlayStation 3
The is the third home video game console produced by Sony Computer Entertainment and the successor to the PlayStation 2 as part of the PlayStation series. The PlayStation 3 competes with Microsoft's Xbox 360 and Nintendo's Wii as part of the seventh generation of video game consoles...

, PlayStation 2
PlayStation 2
The PlayStation 2 is a sixth-generation video game console manufactured by Sony as part of the PlayStation series. Its development was announced in March 1999 and it was first released on March 4, 2000, in Japan...

 and Nintendo DS
Nintendo DS
The is a portable game console produced by Nintendo, first released on November 21, 2004. A distinctive feature of the system is the presence of two separate LCD screens, the lower of which is a touchscreen, encompassed within a clamshell design, similar to the Game Boy Advance SP...

 was released in 2008 and Sonic & Sega All-Stars Racing
Sonic & Sega All-Stars Racing
Sonic & Sega All-Stars Racing is a racing game in the Sega Superstars series produced for Wii, Xbox 360, PlayStation 3, Nintendo DS and Microsoft Windows, featuring characters from many Sega franchises. It is being published by Sega and developed by Sumo Digital...

 for the Wii
Wii
The Wii is a home video game console released by Nintendo on November 19, 2006. As a seventh-generation console, the Wii primarily competes with Microsoft's Xbox 360 and Sony's PlayStation 3. Nintendo states that its console targets a broader demographic than that of the two others...

, Xbox 360
Xbox 360
The Xbox 360 is the second video game console produced by Microsoft and the successor to the Xbox. The Xbox 360 competes with Sony's PlayStation 3 and Nintendo's Wii as part of the seventh generation of video game consoles...

, PlayStation 3
PlayStation 3
The is the third home video game console produced by Sony Computer Entertainment and the successor to the PlayStation 2 as part of the PlayStation series. The PlayStation 3 competes with Microsoft's Xbox 360 and Nintendo's Wii as part of the seventh generation of video game consoles...

, Nintendo DS
Nintendo DS
The is a portable game console produced by Nintendo, first released on November 21, 2004. A distinctive feature of the system is the presence of two separate LCD screens, the lower of which is a touchscreen, encompassed within a clamshell design, similar to the Game Boy Advance SP...

 and PC
Personal computer
A personal computer is any general-purpose computer whose size, capabilities, and original sales price make it useful for individuals, and which is intended to be operated directly by an end-user with no intervening computer operator...

 and Apple iOS was released in 2010.

Nintendo 3DS (2011-present)

Even early in the system's lifecycle, a number of Sonic games were announced for the Nintendo 3DS
Nintendo 3DS
The is a portable game console produced by Nintendo. The autostereoscopic device is able to project stereoscopic 3D effects without the use of 3D glasses or any additional accessories. The Nintendo 3DS features backward compatibility with Nintendo DS series software, including Nintendo DSi software...

. At E3 2010, an untitled Sonic game was announced for the system, which later turned out to be a portable version of Sonic Generations
Sonic Generations
is a 2011 platform video game in the Sonic the Hedgehog series, produced by Sonic Team for PlayStation 3, Xbox 360, Microsoft Windows and Nintendo 3DS...

. A third installment of the Sonic and Mario crossover series, Mario & Sonic at the London 2012 Olympic Games
Mario & Sonic at the London 2012 Olympic Games
is a 2011 sports video game developed by Sega Japan. It was published by Nintendo for Japan and by Sega for North America, Europe, and all other regions. The game is officially licensed by the International Olympic Committee through exclusive licensee International Sports Multimedia...

 has also been announced for release on the system.

Rings

One distinctive feature of Sonic games are the collectible golden rings spread throughout the levels. This gameplay device allows players possessing at least one ring to survive upon sustaining damage from an enemy or hazardous object; instead of dying, the player's rings are scattered. In most Sonic games, a hit causes the player to lose all rings, although in certain games a hit only costs a set number of rings. When the rings are scattered, the player has a short amount of time to recollect some of them before they disappear.

Some causes of death cannot be prevented by holding a ring, including being crushed, falling into a bottomless pit, drowning, and running out of time.

In line with many platform games, collecting 100 rings usually rewards Sonic or any other playable character with an extra life
1-up
1-up , pronounced "one up", is a term in console video gaming that commonly refers to an item that gives the player an extra life, to complete the game. In certain games, it is possible to receive multiple extra lives at once...

. Certain games in the series often reward the collection of 50 rings with Chaos Emeralds, access to the Special Stages in which the Chaos Emeralds may be obtained, or utilization of a character's super transformation.

In some 3D games, rings retained by the end of a level are usable as currency to buy things such as Chao food or special abilities. In some games, such as SegaSonic the Hedgehog
SegaSonic the Hedgehog
is an isometric platform game in the Sonic the Hedgehog series, released by Sega for Japanese arcades in June 1993. The game supported three players playing simultaneously, and possessed a unique track ball set up for moving on-screen characters. The only other control input was a single button,...

, Tails & Eggman levels in Sonic Adventure 2
Sonic Adventure 2
Sonic Adventure 2 is a platform game developed by Sonic Team and published by Sega for the Dreamcast video game console. It was released in North America on June 19, 2001 and in Japan on June 23, 2001 to mark the 10th anniversary of the release of the first Sonic the Hedgehog game. It is the sequel...

 and the Werehog segments of Sonic Unleashed
Sonic Unleashed
Sonic Unleashed , is a video game and the 11th installment in the Sonic the Hedgehog series developed by Sonic Team and published by Sega for multiple platforms...

, rings can also be used to restore health. In the Sonic Riders
Sonic Riders
is a video game spin-off produced by Sega and developed by Sonic Team in cooperation with NowPro, for the Nintendo GameCube, PlayStation 2, Xbox and PC. It is the fourth racing game in the Sonic the Hedgehog series, preceded by Sonic Drift, Sonic Drift 2 and Sonic R.The game was released to start...

 games, collecting rings often increases characters' racing statistics.

Chaos Emeralds

The Chaos Emeralds are, in most games, seven emerald
Emerald
Emerald is a variety of the mineral beryl colored green by trace amounts of chromium and sometimes vanadium. Beryl has a hardness of 7.5–8 on the 10 point Mohs scale of mineral hardness...

s with mystical powers; they are a recurring feature of Sonic games. The emeralds can turn thoughts into power, warp time and space with a technique called Chaos Control, give energy to all living things and be used to create nuclear or laser based weaponry.

They are the basis of many of the games' plots, and the player is frequently required to collect them all to fully defeat Doctor Eggman and achieve the games' "good endings", super forms, or both. An exeption to this is Sonic Colors(Wii), in which the player does not need the Chaos Emeralds to fully complete the game. The method used to acquire the Emeralds and the end-results after collecting them differs between titles in the series. Most early games require the player to find the emeralds in Special Stages, while some modern games implement the emeralds as a plot element. In certain games, such as Sonic R
Sonic R
Sonic R is a racing game developed by Traveller's Tales and Sonic Team for the Sega Saturn and PC, the latter version being ported to the GameCube and the PlayStation 2 in Sonic Gems Collection. It features characters from the Sonic the Hedgehog series...

 and the 8-bit versions of Sonic the Hedgehog
Sonic the Hedgehog (8-bit)
The game's soundtrack was composed by chiptune musician Yuzo Koshiro. He adapted several pieces of music from the original 16-bit version, while the rest of the soundtrack consisted of his own original music. One of his original pieces, the "Bridge Zone" theme, was later sampled in Janet Jackson's...

 and Sonic the Hedgehog 2
Sonic the Hedgehog 2 (8-bit)
Sonic the Hedgehog 2 is a 8-bit 1992 side-scrolling platform handheld console video game developed by Aspect Co., Ltd. and released by Sega for their Master System and Game Gear formats. The Master System version was released in Europe on October 16, 1992...

, the player is required to find the Chaos Emeralds within the zones themselves.

The Master Emerald was introduced in Sonic & Knuckles
Sonic & Knuckles
Sonic & Knuckles is a 1994 platform video game in the Sonic the Hedgehog series for the Sega Mega Drive/Genesis. It was developed in the United States at Sega Technical Institute by members of Sonic Team, and was published by Sega worldwide on October 18, 1994.As well as working as a standalone...

 as a plot element. It resides in a shrine on Angel Island and is guarded by Knuckles the Echidna
Knuckles the Echidna
Knuckles the Echidna is a video game character of the Sonic the Hedgehog game series, including spin-off games and comics. His first appearance was in Sonic the Hedgehog 3, released in 1994 to introduce a new rival for Sonic. He was presented as an antagonist who was tricked by Dr. Eggman into...

, as only those of the Echidna Tribe are able to control it. The power of the Master Emerald is what keeps Angel Island afloat in the sky. It can control the power of the Chaos Emeralds, including neutralizing or amplifying their energies.

In Sonic & Knuckles, the Master Emerald is stolen by Dr. Robotnik to power up a weapon/ship known as the Death Egg. In Sonic Adventure
Sonic Adventure
is a 1999 platform video game developed by Sonic Team and released on December 23, 1998, in Japan by Sega for the Dreamcast. One of its development titles was Sonic RPG...

, the Master Emerald is shattered, and Knuckles must collect the shards as part of his individual story. The Emerald shows its ability to negate the energy of the Chaos Emeralds in Sonic Adventure and Sonic Adventure 2
Sonic Adventure 2
Sonic Adventure 2 is a platform game developed by Sonic Team and published by Sega for the Dreamcast video game console. It was released in North America on June 19, 2001 and in Japan on June 23, 2001 to mark the 10th anniversary of the release of the first Sonic the Hedgehog game. It is the sequel...

, and empower them in Sonic 3 as well as in Sonic & Knuckles. The Master Emerald can also be used to power mechanical devices, and has been coveted by Dr. Robotnik since his discovery of it. During Knuckles' final boss fight in Sonic & Knuckles, Mecha Sonic uses the Master Emerald to power up into a super form.

Special Stages

Usually, Special Stages were employed as a means of earning Chaos Emeralds. Special Stages usually take place in surreal
Surrealism
Surrealism is a cultural movement that began in the early 1920s, and is best known for the visual artworks and writings of the group members....

 environments and feature alternate gameplay mechanics to the standard platforming of the main levels. The 16-bit Sonic the Hedgehog consisted of a giant rotating maze, which many considered a major technical achievement. The most common special stages, however, were segments with the character running through a long tunnel to collect certain items. 3D "collect item" levels, as in Sonic 3
Sonic the Hedgehog 3
Sonic the Hedgehog 3 is a 1994 platform video game in the Sonic the Hedgehog series for the Sega Mega Drive/Genesis. It was developed in the United States by members of Sonic Team working at Sega Technical Institute, and was published by Sega, debuting worldwide in the first half of 1994...

 and Sonic & Knuckles
Sonic & Knuckles
Sonic & Knuckles is a 1994 platform video game in the Sonic the Hedgehog series for the Sega Mega Drive/Genesis. It was developed in the United States at Sega Technical Institute by members of Sonic Team, and was published by Sega worldwide on October 18, 1994.As well as working as a standalone...

, used the same perspective but had Sonic collecting all the blue-colored orbs on the surface of a giant sphere. Finally, Sonic Advance 2
Sonic Advance 2
is a side-scrolling platform game in the Sonic the Hedgehog series, developed by Dimps and published by THQ for the Game Boy Advance. The game was released in Japan on December 19, 2002, in North America on March 9, 2003, in Europe on March 18, 2003...

 employed a 3D ring-collecting stage, and Sonic Chaos
Sonic Chaos
Sonic Chaos is a platform game for the Sega Master System and Sega Game Gear, developed by Aspect and published by Sega in 1993...

 (Sonic and Tails in Japan) used a variety of gimmicks for its levels. In Sonic Adventure 2:Battle once all emblems are collected with A-ranks on all levels a 3D version of Green Hill Zone is unlocked.

Since Emeralds of the 8-bit version of Sonic the Hedgehog were hidden in the main stages, the game's spring-filled Special Stages were merely used as a means of adding variety, increasing score and earning continues. Similarly, Sonic 3 & Knuckles, in addition to the main Special Stages, featured entirely optional bonus stages, one of which combined the rotating maze of Sonic the Hedgehog with the pinball gambling of Sonic the Hedgehog 2
Sonic the Hedgehog 2 (16-bit)
Sonic the Hedgehog 2 is a 16-bit 1992 platform video game that was developed by Sonic Team members working at the Sega Technical Institute, and published by Sega for the Sega Genesis console. It was released in Japan on November 21, 1992 and in North America and Europe on November 24, 1992...

. Sonic Heroes
Sonic Heroes
is a 2004 platforming single-player/multiplayer video game in the Sonic the Hedgehog series developed by Sonic Team USA. It is the first multiplatform title in the Sonic series, developed for Nintendo GameCube, PlayStation 2 and Xbox and released in Japan in December 2003, in North America in...

 contained an alternate Special Stage for a chance of earning additional lives.

Super transformation

A super transformation is a state certain characters go into that gives them incredible speed, near-invincibility and a change in color. In some games, characters are still vulnerable to being crushed, drowning, falling into a pit or running out of time. Depending on the type of transformation, the condition to attain such a form is an individual making contact with all of the Chaos Emeralds, the Sol Emeralds, or the Master Emerald.

Super transformations first appeared in Sonic the Hedgehog 2, where Sonic transforms into Super Sonic if all seven Chaos Emeralds and fifty or more rings are held at the same time. While in Super Sonic form, one ring is lost for every second that passes, and Sonic reverts back to normal if the number of rings drops to zero. In Sonic & Knuckles
Sonic & Knuckles
Sonic & Knuckles is a 1994 platform video game in the Sonic the Hedgehog series for the Sega Mega Drive/Genesis. It was developed in the United States at Sega Technical Institute by members of Sonic Team, and was published by Sega worldwide on October 18, 1994.As well as working as a standalone...

, Knuckles also has this ability. In Sonic 3 & Knuckles, Sonic and Knuckles can also gain a "Hyper" status after gaining all seven Super Emeralds. The same achievement when playing as Tails only unlocks his Super form.

In most 3D Sonic games starting with Sonic Adventure, Chaos Emeralds are collected in non-interactive cut scenes as part of the story, with Super Sonic and other super characters only appearing in the final boss fights. Most 2D Sonic platform games, like the Advance and Rush series, have retained the gameplay-based emerald collecting, but still have Super Sonic only playable in the "Extra" boss battles. Recent games such as Sonic the Hedgehog 4
Sonic the Hedgehog 4
is an episodic platform video game and a sequel in the Sonic the Hedgehog series. The game was developed by Dimps alongside members of Sonic Team and is intended to be inspired by and similar to the original Sonic the Hedgehog titles on the Sega Mega Drive/Genesis.Episode I was released in October...

, Sonic Colors
Sonic Colors
is a 2010 platforming game in the Sonic the Hedgehog series. It was first announced on May 26, 2010, in a press release by Sega for Italy, and it included a teaser trailer...

 and Sonic Generations
Sonic Generations
is a 2011 platform video game in the Sonic the Hedgehog series, produced by Sonic Team for PlayStation 3, Xbox 360, Microsoft Windows and Nintendo 3DS...

 once again allow players to play as Super Sonic during normal stages, provided they have all the Chaos Emeralds.

Sonic the Hedgehog
Sonic the Hedgehog (character)
, trademarked Sonic The Hedgehog, is a video game character and the main protagonist of the Sonic video game series released by Sega, as well as in numerous spin-off comics, cartoons, and a feature film. The first game was released on June 23, 1991, to provide Sega with a mascot to rival Nintendo's...

, Miles "Tails" Prower
Miles "Tails" Prower
, better known by his nickname , is a character, as well as the main deuteragonist in the Sonic the Hedgehog series of video games, comics, animated series and film released by Sega....

, Knuckles the Echidna
Knuckles the Echidna
Knuckles the Echidna is a video game character of the Sonic the Hedgehog game series, including spin-off games and comics. His first appearance was in Sonic the Hedgehog 3, released in 1994 to introduce a new rival for Sonic. He was presented as an antagonist who was tricked by Dr. Eggman into...

, Mecha Sonic, Shadow the Hedgehog
Shadow the Hedgehog
is a character from the Sonic the Hedgehog series. Shadow is an artificially-created life form. His trademark hover shoes propel him at extreme speeds that rival those of Sonic, and with a Chaos Emerald he has the ability to distort time and space using "Chaos Control." Often referred to as being...

, Blaze the Cat, and Silver the Hedgehog, are the characters that can perform super transformations.

Emblems

Emblems are used in several sonic games. They are awarded once the player either successfully completes a level or achieves an objective.

Item boxes

these are containers hold power-up
Power-up
In computer and video games, power-ups are objects that instantly benefit or add extra abilities to the game character as a game mechanic. This is in contrast to an item, which may or may not have a benefit and can be used at a time chosen by the player...

s and appear frequently throughout the stages. An icon on each box indicates what it contains, and the player releases the item by destroying the box. In the early games, item boxes resembled television sets and could only be destroyed with an attack; in later titles, they became transparent capsule-like objects easily destroyed with one touch. Common items in boxes include rings, a barrier (or shield), invincibility, high speed (or power sneakers) and 1-up
1-up
1-up , pronounced "one up", is a term in console video gaming that commonly refers to an item that gives the player an extra life, to complete the game. In certain games, it is possible to receive multiple extra lives at once...

s.

The barrier is a spherical energy shield which surrounds and protects the player's character from one attack; when hit, the barrier is lost instead of rings or a life. In Sonic 3 additional barriers were introduced which gave the player special abilities, such as the ability to magnetically attract rings and double jump, breathe underwater, resist fire and even damage nearby enemies (Shadow the Hedgehog).

Invincibility temporarily protects against damage done by enemies and obstacles, and allows the player to destroy enemies by touching them and not lose any rings. Death from crushing, falling, drowning and time-ups, however, are still possible.

High speed boxes give the player character enhanced speed for a limited time.

1-up boxes display the face of the player's character and give the player one extra life. In the event that a player loses a stage, this enables the player to restart the level at the starting point, or, if one has been passed, close to the last checkpoint. Multiple lives can be collected, generally up to 99.

Other item boxes featured include a box with Robotnik's face on it, which cause damage to whoever opens it, and a "teleport box" (Sonic 2's 2-player mode only), which swapped both players' positions.

Giant Rings/Warp Ring

Giant Rings were featured in a few Sonic games, mainly from the 16-bit era. They served as a portal to enter a Special Stage, where the player could collect one of the Chaos Emeralds or, in certain circumstances, Super Emeralds. In Sonic the Hedgehog 3
Sonic the Hedgehog 3
Sonic the Hedgehog 3 is a 1994 platform video game in the Sonic the Hedgehog series for the Sega Mega Drive/Genesis. It was developed in the United States by members of Sonic Team working at Sega Technical Institute, and was published by Sega, debuting worldwide in the first half of 1994...

, if all Emeralds have already been found, touching them rewards the player fifty rings. In most games since Sonic Adventure 2, these giant rings have been renamed Goal Rings and serve in place of the old signposts as the end level marker, which ends the level upon touching it.

Checkpoints

Checkpoints are items placed throughout the stages in Sonic games which serve mainly as progress markers. If the player runs through one, their progress through a level is "saved". If the player then loses a life on the same stage, they will start over at the last checkpoint passed. Checkpoints also serve other uses in various games, such as entering Special Stages in Sonic the Hedgehog 2, and leveling up in Sonic Heroes
Sonic Heroes
is a 2004 platforming single-player/multiplayer video game in the Sonic the Hedgehog series developed by Sonic Team USA. It is the first multiplatform title in the Sonic series, developed for Nintendo GameCube, PlayStation 2 and Xbox and released in Japan in December 2003, in North America in...

. In the 2D games, checkpoints take the appearance of posts, while in 3D games they are either small gates or pads on the ground.

Springs

Springs are a staple in the Sonic series. They are scattered throughout the levels and serve to catapult the player at high speeds in a particular direction. Sometimes they allow the player to proceed further in the level, while other times they are used to hinder the player, usually by sending Sonic towards a dangerous area. Sonic Unleashed in particular features springs with Dr. Eggman's face on them that launch Sonic towards danger or hinder his progress. Springs serve as one of Sonic's special moves in Super Smash Bros. Brawl.

Animals

The Sonic the Hedgehog universe is populated with typical as well as anthropomorphic animals. These small animals (referred to as "Sonic's friends" in earlier games) are often used by Dr. Robotnik as "organic batteries" to power his robot armies. The trapped animals can usually be freed by hitting the robot and destroying its metal case. In Sonic Adventure
Sonic Adventure
is a 1999 platform video game developed by Sonic Team and released on December 23, 1998, in Japan by Sega for the Dreamcast. One of its development titles was Sonic RPG...

 and Sonic Adventure 2
Sonic Adventure 2
Sonic Adventure 2 is a platform game developed by Sonic Team and published by Sega for the Dreamcast video game console. It was released in North America on June 19, 2001 and in Japan on June 23, 2001 to mark the 10th anniversary of the release of the first Sonic the Hedgehog game. It is the sequel...

, the small animals can be given to Chao, altering their appearance and attributes. The small animals were originally the major population of Sonic's world, before Sonic Adventure, which introduced human populations and cities.

A Flicky
Flicky
Flicky is an arcade game made by Sega. First released in arcades in 1984, Flicky was also released at the time for the SG-1000, and then ported to the MSX and Japanese computers Sharp X1, Fujitsu FM-7 and NEC PC-8801. It was later ported to the Sega Mega Drive/Genesis in 1991...

 is one of the most prominently used animals in Eggman's experiments. This small bird's first appearance in a game predates Sonic. Flicky and its respective game
Flicky
Flicky is an arcade game made by Sega. First released in arcades in 1984, Flicky was also released at the time for the SG-1000, and then ported to the MSX and Japanese computers Sharp X1, Fujitsu FM-7 and NEC PC-8801. It was later ported to the Sega Mega Drive/Genesis in 1991...

 were alluded to in Sonic 3D Blast.

Music

Numerous composers have contributed music the Sonic the Hedgehog series. Masato Nakamura
Masato Nakamura
is a Japanese musician, bass guitarist, and record producer.- Life and music career :Nakamura was originally a session musician before forming the "Cha-Cha & Audrey's Project" with Miwa Yoshida. In 1988, they formed the band Dreams Come True....

 of J-pop
J-pop
, an abbreviation for Japanese pop, is a musical genre that entered the musical mainstream of Japan in the 1990s. Modern J-pop has its roots in 1960s music, such as The Beatles, and replaced kayōkyoku in the Japanese music scene...

 band Dreams Come True was responsible for the music of the first two 16-bit games. Ys/Streets of Rage
Streets of Rage
Streets of Rage, known in Japan as , is a side-scrolling beat 'em up released by Sega in 1991 for the Sega Mega Drive/Genesis. It is the first installment of the Streets of Rage series which was followed by Streets of Rage 2 and Streets of Rage 3. The game was also converted over to Sega's Game...

 composer Yuzo Koshiro
Yuzo Koshiro
is a Japanese video game music composer and audio programmer. He is regarded as one of the most influential innovators in chiptune music and video game sound design...

 composed the tunes for the first 8-bit title, except for what was retained from the 16-bit version.

Sega's in-house music company, Wave Master
Wave Master
Wave Master Inc. is a research and development team for Sega, focusing on the soundtracks for various games...

, composed the majority of the music in later titles. One Wave Master employee, Jun Senoue
Jun Senoue
is a video game composer and musician from Wave Master, well known for some of his contributions in many Sonic the Hedgehog games. He is also the guitarist for the band Crush 40, which also contributes to many Sonic the Hedgehog games.-Biography:...

, is a member of the band Crush 40
Crush 40
Crush 40, formerly known as Sons of Angels, is a Japanese-American hard rock band formed in 1997 that is best known for their contributions to the soundtracks of several video games, predominantly the Sonic the Hedgehog series...

, and through his ties to the band they have played the main theme tunes of both of the Sonic Adventure
Sonic Adventure
is a 1999 platform video game developed by Sonic Team and released on December 23, 1998, in Japan by Sega for the Dreamcast. One of its development titles was Sonic RPG...

 games, Sonic Heroes
Sonic Heroes
is a 2004 platforming single-player/multiplayer video game in the Sonic the Hedgehog series developed by Sonic Team USA. It is the first multiplatform title in the Sonic series, developed for Nintendo GameCube, PlayStation 2 and Xbox and released in Japan in December 2003, in North America in...

, Shadow the Hedgehog
Shadow the Hedgehog (video game)
Shadow the Hedgehog is a 2005 video game developed by Sega Studio USA, the former United States division of Sega's Sonic Team. Featuring the titular fictional character Shadow the Hedgehog from Sega's Sonic the Hedgehog series, the game was revealed at the March 2005 Walk of Game inauguration of...

 and Sonic and the Black Knight
Sonic and the Black Knight
is a title within the Sonic the Hedgehog series, released exclusively on Wii as the second entry in the Sonic Storybook series, following on from Sonic and the Secret Rings. The game is directed by Tetsu Katano, who was the lead programmer of the Sonic Adventure titles and Sonic Heroes...

. Heroes and Shadow the Hedgehog also featured other bands, such as Julien-K
Julien-K
Julien-K is a music group that began as a side project for electronic music created by Amir Derakh and Ryan Shuck from Orgy, with the later addition of Elias Andra, and Anthony 'Fu' Valcic....

. For the 2006 Sonic the Hedgehog game, Senoue and Crush 40 performed a remix of "All Hail Shadow" to play as Shadow the Hedgehog's theme for the game.

Richard Jacques
Richard Jacques
Richard Jacques is a British music composer. He is best known for his video game music, most notably for numerous video games created by Sega.-Early life:...

, a frequent composer of music for Sega
Sega
, usually styled as SEGA, is a multinational video game software developer and an arcade software and hardware development company headquartered in Ōta, Tokyo, Japan, with various offices around the world...

 games, contributed to the soundtrack
Soundtrack
A soundtrack can be recorded music accompanying and synchronized to the images of a motion picture, book, television program or video game; a commercially released soundtrack album of music as featured in the soundtrack of a film or TV show; or the physical area of a film that contains the...

s of Sonic R
Sonic R
Sonic R is a racing game developed by Traveller's Tales and Sonic Team for the Sega Saturn and PC, the latter version being ported to the GameCube and the PlayStation 2 in Sonic Gems Collection. It features characters from the Sonic the Hedgehog series...

, the Saturn/PC version of Sonic 3D Blast: Flickies' Island and most recently, Sonic and the Black Knight
Sonic and the Black Knight
is a title within the Sonic the Hedgehog series, released exclusively on Wii as the second entry in the Sonic Storybook series, following on from Sonic and the Secret Rings. The game is directed by Tetsu Katano, who was the lead programmer of the Sonic Adventure titles and Sonic Heroes...

. Runblebee has performed songs for Sonic games such as Sonic Riders
Sonic Riders
is a video game spin-off produced by Sega and developed by Sonic Team in cooperation with NowPro, for the Nintendo GameCube, PlayStation 2, Xbox and PC. It is the fourth racing game in the Sonic the Hedgehog series, preceded by Sonic Drift, Sonic Drift 2 and Sonic R.The game was released to start...

 and Sonic and the Secret Rings
Sonic and the Secret Rings
is a video game developed by Sonic Team and published by Sega as part of the Sonic the Hedgehog series. It was released exclusively for the Wii on February 20, 2007 in North America; March 2 in Europe; and March 15 in Japan. It is the first Sonic game for the console, released in place of an...

, and Steve Conte performed the Sonic and the Secret Rings main theme, "Seven Rings In Hand", as well as its end theme "Worth A Chance".

On several recent games, well-known artists have contributed music to the series. For example, Bowling for Soup
Bowling for Soup
Bowling for Soup is an American pop-punk band which originally formed in Wichita Falls, Texas in 1994...

 lead singer Jaret Reddick
Jaret Reddick
Jaret Ray Reddick is an American singer-songwriter, musician, composer, and voice actor, best known as the lead vocalist, rhythm guitarist, and lead songwriter for the Grammy Award-nominated pop punk band Bowling for Soup. He plays a Music Man Axis that has a flag of Texas design on...

 performed "Endless Possibility", the main theme of Sonic Unleashed, and former Megadeth
Megadeth
Megadeth is an American heavy metal band from Los Angeles, California which was formed in 1983 by guitarist/vocalist Dave Mustaine, bassist Dave Ellefson and guitarist Greg Handevidt, following Mustaine's expulsion from Metallica. The band has since released 13 studio albums, three live albums, two...

 guitarist Marty Friedman played on "With Me", the final boss theme for Sonic and the Black Knight.

Animation

A number of cartoons have been made based on the Sonic the Hedgehog video games. DIC Entertainment
DiC Entertainment
DIC Entertainment was an international film and television production company. In addition to animated television shows such as Ulysses 31 , Inspector Gadget , The Littles , The Real Ghostbusters , Captain Planet and the Planeteers , and the first two seasons of the English adaptation of...

's Adventures of Sonic the Hedgehog
Adventures of Sonic the Hedgehog
The Adventures of Sonic the Hedgehog is an American animated series that was first broadcast in September 1993, and only for one season...

 was an American animated television series that was first broadcast in September 1993, and ran in cartoon
Cartoon
A cartoon is a form of two-dimensional illustrated visual art. While the specific definition has changed over time, modern usage refers to a typically non-realistic or semi-realistic drawing or painting intended for satire, caricature, or humor, or to the artistic style of such works...

 syndication
Television syndication
In broadcasting, syndication is the sale of the right to broadcast radio shows and television shows by multiple radio stations and television stations, without going through a broadcast network, though the process of syndication may conjure up structures like those of a network itself, by its very...

 for a number of years afterward. It follows the escapades of Sonic and Tails as they stop the evil Dr. Ivo Robotnik and his array of vicious robot
Robot
A robot is a mechanical or virtual intelligent agent that can perform tasks automatically or with guidance, typically by remote control. In practice a robot is usually an electro-mechanical machine that is guided by computer and electronic programming. Robots can be autonomous, semi-autonomous or...

s from taking over the planet Mobius. The plots very loosely followed the style of the early video games series, but focused very little on character development.

DIC also produced the second Sonic the Hedgehog cartoon, called Sonic the Hedgehog: The Animated Series
Sonic the Hedgehog (TV series)
Sonic the Hedgehog: The Animated Series is an American animated series produced by DIC Entertainment with the partnership of Sega of America and was based on the Sonic the...

, which originally aired from September 1993 to June 1995. While Adventures of Sonic the Hedgehog is known for its bright colors and whimsical humor, Sonic the Hedgehog featured darker, more dramatic stories which still constitute a departure from the tone of most of the Sonic games. The Sonic franchise was still quite new and lacked both plot and character development, so the show's writers filled in the details. The Sonic the Hedgehog
Sonic the Hedgehog (comics)
Sonic the Hedgehog is an ongoing series of American comic books published by Archie Comics, featuring Sega's mascot video game character of the same name. The comic book series debuted in the United States as a 4 part mini-series published between November 1992 and February 1993...

 comic book uses several characters from this series.

A two-episode OVA
Original video animation
, abbreviated as media , are animated films and series made specially for release in home-video formats. The term originated in relation to Japanese animation...

 series based upon the game Sonic CD and the video game series as a whole, Sonic the Hedgehog: The Movie
Sonic the Hedgehog: The Movie
Sonic the Hedgehog: The Movie is a two-episode OVA film series based on Sega's best-selling franchise Sonic the Hedgehog....

, was released in Japan
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

 in 1996 and released as an English dub in North America in 1999. Unlike the games, the film takes place on a world named Planet Freedom. It was the first to introduce an animated appearance of Knuckles the Echidna, and the first time before Sonic Adventure that Sonic, Knuckles, and Tails were seen as a full team.

The cartoon Sonic Underground
Sonic Underground
Sonic Underground is an animated series that follows the adventures of Sonic the Hedgehog and his siblings, Sonia and Manic. The cartoon follows a main plot similar to, but heavily reconcepted from, main plot of Sonic the Hedgehog: The Animated Series...

 ran for 40 episodes in 1999, but bared little relation to other cartoons or video games. The last Sonic series from DIC Entertainment, the show was animated like Sonic the Hedgehog, but was broadcast in syndication, and had major differences, including the absence of Tails and the appearances of Knuckles.

The anime Sonic X
Sonic X
is an anime series based on the Sonic the Hedgehog video game series. It was produced in Japan by TMS Entertainment with the partnership of Sega and was created by Sonic Team and Sonic Project. In the United States, 4Kids currently owns and manages copyright and branding of the series.- Series 1 ...

 is the longest-running animated series based on Sonic to date. It spanned 3 seasons and 78 episodes and was inspired by the plots of the Sonic Adventure series.

Comics

A number of Sonic the Hedgehog comic book
Comic book
A comic book or comicbook is a magazine made up of comics, narrative artwork in the form of separate panels that represent individual scenes, often accompanied by dialog as well as including...

s and manga
Manga
Manga is the Japanese word for "comics" and consists of comics and print cartoons . In the West, the term "manga" has been appropriated to refer specifically to comics created in Japan, or by Japanese authors, in the Japanese language and conforming to the style developed in Japan in the late 19th...

 have been produced. The Sonic the Hedgehog manga series, published in Shogakukan's
Shogakukan
is a Japanese publisher of dictionaries, literature, manga, non-fiction, DVDs, and other media in Japan.Shogakukan founded Shueisha which founded Hakusensha. These are three separate companies, but are together called the Hitotsubashi Group, one of the largest publishing groups in Japan...

 Shogaku Yonensei was written by Kenji Terada
Kenji Terada
is a Japanese scenario writer, anime director, series organizer and novelist. He is probably best known for writing the first three games of the Final Fantasy series, his work on Batman: Dark Tomorrow, and as the series organizer and main script writer for the Kimagure Orange Road series...

 and illustrated by Sango Norimoto. The manga, which started in 1992, was about a hedgehog boy named Nicky who can turn into Sonic the Hedgehog. Sonic fights Eggman, with Tails tagging along to help him.

Sonic the Comic
Sonic the Comic
Sonic the Comic, known to its many readers as STC, was a UK children's comic published fortnightly by Fleetway Editions between 1993 and 2002...

 was a British comic published by Fleetway Editions
Fleetway
Fleetway, also known as Fleetway Publications and Fleetway Editions, was a UK publishing company which mainly produced comic magazines. For a time owned by IPC Media, they are now a division of Egmont Publishing....

 between 1993 and 2002. Labeled "The UK's official Sega comic", in addition to Sonic the Hedgehog stories it also included comic strips based on other Sega games such as Ecco the Dolphin
Ecco the Dolphin
Ecco the Dolphin is a puzzle video game released in 1992 for the Sega Mega Drive/Genesis. The central character, Ecco, is a bottlenose dolphin controlled by the player through a progression of side-scrolling aquatic levels...

 and Decap Attack
Decap Attack
Decap Attack, a westernised version of the Japanese game , is a video game for the Mega Drive/Genesis console. The game is also a part of the Sega Genesis Collection for the PlayStation 2 and PlayStation Portable and Sonic's Ultimate Genesis Collection for Xbox 360 and PlayStation 3...

.

Sonic the Hedgehog
Sonic the Hedgehog (comics)
Sonic the Hedgehog is an ongoing series of American comic books published by Archie Comics, featuring Sega's mascot video game character of the same name. The comic book series debuted in the United States as a 4 part mini-series published between November 1992 and February 1993...

 is an ongoing series of American comic books published by Archie Comics
Archie Comics
Archie Comics is an American comic book publisher headquartered in the Village of Mamaroneck, Town of Mamaroneck, New York, known for its many series featuring the fictional teenagers Archie Andrews, Betty Cooper, Veronica Lodge, Reggie Mantle and Jughead Jones. The characters were created by...

. All of Archie's Sonic-related publications take place in the same fictional universe
Fictional universe
A fictional universe is a self-consistent fictional setting with elements that differ from the real world. It may also be called an imagined, constructed or fictional realm ....

, which incorporates aspects of the video games and Sonic the Hedgehog: the Animated Series
Sonic the Hedgehog (TV series)
Sonic the Hedgehog: The Animated Series is an American animated series produced by DIC Entertainment with the partnership of Sega of America and was based on the Sonic the...

 in addition to elements unique to that comic universe. Archie Comics also published an ongoing Sonic X
Sonic X (comics)
Sonic X was an ongoing comic book series published by Archie Comics, based on the English dub of the Japanese anime of the same name. Like Archie's other title, Sonic the Hedgehog, Sonic X features SEGA's mascot video game character Sonic. It began in September 2005 and was originally meant to be a...

 comic book that supplemented the stories from the animated series of the same name
Sonic X
is an anime series based on the Sonic the Hedgehog video game series. It was produced in Japan by TMS Entertainment with the partnership of Sega and was created by Sonic Team and Sonic Project. In the United States, 4Kids currently owns and manages copyright and branding of the series.- Series 1 ...

. It began in September 2005 and was originally meant to be a four-part series; however, due to the positive reaction to the series' announcement, it was extended to ongoing status before the first issue premiered. The comic borrowed elements from the animated series' first two seasons and characters from the Sonic Adventure storyline. The comic was eventually canceled, its place taken by the new Sonic comic book series entitled Sonic Universe
Sonic Universe
Sonic Universe is a comic book series set within Archie Comics's Sonic the Hedgehog continuity, designed to expand the horizon of that fictional universe. Sonic Universe deals with various characters throughout the fictional universe, including Shadow the Hedgehog, Knuckles the Echidna and many more...

.

Reception and legacy

The Sonic the Hedgehog franchise was awarded seven records by Guinness World Records in Guinness World Records: Gamer's Edition 2008. The records include "Best Selling Game on Sega Systems", "Longest Running Comic Based on a Video Game" and "Best Selling Retro Game Compilation" (for Sonic Mega Collection). In the Guinness World Records: Gamer's Edition 2010, the Sonic the Hedgehog series was listed number 15 out of the top 50 video game franchises. In December 2006, IGN
IGN
IGN is an entertainment website that focuses on video games, films, music and other media. IGN's main website comprises several specialty sites or "channels", each occupying a subdomain and covering a specific area of entertainment...

 ranked Sonic the Hedgehog as the 19th greatest series of all time, claiming that "although recent 3D entries in the series have been somewhat lacking, there is no denying the power of this franchise."

A common criticism has been that the variant gameplay styles found in recent 3D titles have strayed from the formula of the original series. Specifically, the series' jump to 3D has been noted as a declining point. Many sources pin-point 2003's Sonic Heroes
Sonic Heroes
is a 2004 platforming single-player/multiplayer video game in the Sonic the Hedgehog series developed by Sonic Team USA. It is the first multiplatform title in the Sonic series, developed for Nintendo GameCube, PlayStation 2 and Xbox and released in Japan in December 2003, in North America in...

 as the beginning of the series' decline. In late 2010, Sega delisted several below average Sonic titles, such as the poorly received Sonic the Hedgehog (2006), in order to increase the value of the Sonic brand after very positive reviews for the games Sonic the Hedgehog 4
Sonic the Hedgehog 4
is an episodic platform video game and a sequel in the Sonic the Hedgehog series. The game was developed by Dimps alongside members of Sonic Team and is intended to be inspired by and similar to the original Sonic the Hedgehog titles on the Sega Mega Drive/Genesis.Episode I was released in October...

 and Sonic Colors
Sonic Colors
is a 2010 platforming game in the Sonic the Hedgehog series. It was first announced on May 26, 2010, in a press release by Sega for Italy, and it included a teaser trailer...

. An article on Yahoo Games titled Then and Now: Game Characters Evolved including many video game icons (Tomb Raider, Master Chief, etc.) stated: "With numerous bad games on his resume, Sega’s speedy mascot has had a hard time recapturing the form that put him on top of the gaming world in 1991. So perhaps it’s best that his next game -- Sonic Generations -- lets the blue blur travel back in time to his younger days."

Sales

Units sold
Year Title Sales
1991 Sonic the Hedgehog 15 million
1992 Sonic the Hedgehog 2
Sonic the Hedgehog 2 (16-bit)
Sonic the Hedgehog 2 is a 16-bit 1992 platform video game that was developed by Sonic Team members working at the Sega Technical Institute, and published by Sega for the Sega Genesis console. It was released in Japan on November 21, 1992 and in North America and Europe on November 24, 1992...

6.03 million
1993 Sonic CD 1.5 million
1994 Sonic the Hedgehog 3
Sonic the Hedgehog 3
Sonic the Hedgehog 3 is a 1994 platform video game in the Sonic the Hedgehog series for the Sega Mega Drive/Genesis. It was developed in the United States by members of Sonic Team working at Sega Technical Institute, and was published by Sega, debuting worldwide in the first half of 1994...

1.8 million
1994 Sonic & Knuckles
Sonic & Knuckles
Sonic & Knuckles is a 1994 platform video game in the Sonic the Hedgehog series for the Sega Mega Drive/Genesis. It was developed in the United States at Sega Technical Institute by members of Sonic Team, and was published by Sega worldwide on October 18, 1994.As well as working as a standalone...

1.8 million
1999 Sonic Adventure
Sonic Adventure
is a 1999 platform video game developed by Sonic Team and released on December 23, 1998, in Japan by Sega for the Dreamcast. One of its development titles was Sonic RPG...

2.5 million
2001 Sonic Adventure 2: Battle 2.5 million
2002 Sonic Advance
Sonic Advance
is a platform game in the Sonic the Hedgehog series, developed by Dimps, published by Sega , by THQ and by Infogrames for Game Boy Advance. It was released in Japan on December 20, 2001, in North America on February 4, 2002 and finally in Europe on March 23, 2002...

1.5 million
2003 Sonic Advance 2
Sonic Advance 2
is a side-scrolling platform game in the Sonic the Hedgehog series, developed by Dimps and published by THQ for the Game Boy Advance. The game was released in Japan on December 19, 2002, in North America on March 9, 2003, in Europe on March 18, 2003...

1 million
2004 Sonic Heroes
Sonic Heroes
is a 2004 platforming single-player/multiplayer video game in the Sonic the Hedgehog series developed by Sonic Team USA. It is the first multiplatform title in the Sonic series, developed for Nintendo GameCube, PlayStation 2 and Xbox and released in Japan in December 2003, in North America in...

5.19 million
2004 Sonic Advance 3
Sonic Advance 3
is a platform game in the Sonic the Hedgehog series, developed by Dimps, Sega and Sonic Team and published by THQ for the Game Boy Advance and the final installment of the Sonic Advance series. It was first released in North America on June 7, 2004, later in Japan on June 17, 2004 and then in...

1.5 million
2005 Shadow the Hedgehog
Shadow the Hedgehog (video game)
Shadow the Hedgehog is a 2005 video game developed by Sega Studio USA, the former United States division of Sega's Sonic Team. Featuring the titular fictional character Shadow the Hedgehog from Sega's Sonic the Hedgehog series, the game was revealed at the March 2005 Walk of Game inauguration of...

1 million
2005 Sonic Rush
Sonic Rush
is a 2005 platform handheld video game developed by Sonic Team and Dimps exclusively for the Nintendo DS as part of Sega's Sonic the Hedgehog series. It was released on November 15, 2005 in North America, November 18 in the PAL region, and November 23 in Japan. It is a 2D platform game, but Sonic's...

3 million
2006 Sonic the Hedgehog (mobile) 8 million
2006 Sonic the Hedgehog (2006 video game) 1.04 million (PS3)
2007 Sonic and the Secret Rings
Sonic and the Secret Rings
is a video game developed by Sonic Team and published by Sega as part of the Sonic the Hedgehog series. It was released exclusively for the Wii on February 20, 2007 in North America; March 2 in Europe; and March 15 in Japan. It is the first Sonic game for the console, released in place of an...

1.2 million
2007 Mario & Sonic at the Olympic Games
Mario & Sonic at the Olympic Games
Mario & Sonic at the Olympic Games, known in Japan as , is a sports video game developed by the Sega Sports R&D Department of Sega Japan. It was published by Nintendo for Japan and by Sega for North America, Europe and all other regions. The game is officially licensed by the International Olympic...

10 million
2007 Sonic Rush Adventure
Sonic Rush Adventure
is a 2007 Sonic the Hedgehog platform game for the Nintendo DS videogame handheld, developed by Dimps and Sonic Team, published by Sega. Sonic the Hedgehog and Blaze the Cat return as playable characters, alongside a new, slightly hotheaded female raccoon named Marine the Raccoon...

1.05 million
2008 Sonic Unleashed
Sonic Unleashed
Sonic Unleashed , is a video game and the 11th installment in the Sonic the Hedgehog series developed by Sonic Team and published by Sega for multiple platforms...

2.45 million
2009 Mario & Sonic at the Olympic Winter Games
Mario & Sonic at the Olympic Winter Games
is a 2009 sports video game developed by Sega. It was published by Nintendo for Japan and by Sega for North America and Europe. The game is officially licensed by the International Olympic Committee through exclusive license International Sports Multimedia...

5.67 million
2010 Sonic Colors
Sonic Colors
is a 2010 platforming game in the Sonic the Hedgehog series. It was first announced on May 26, 2010, in a press release by Sega for Italy, and it included a teaser trailer...

1.85 million
2011 Sonic Generations
Sonic Generations
is a 2011 platform video game in the Sonic the Hedgehog series, produced by Sonic Team for PlayStation 3, Xbox 360, Microsoft Windows and Nintendo 3DS...

TBA


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