Sonic Eraser was a puzzle video game that was available to owners of the Sega Meganet

Sega Meganet

The Sega Toshokan, Sega Game Library or Sega Meganet was a network service in Japan for people using the Sega Mega Drive. Debuting in 1990, this was the first time online multiplayer console gaming was possible. However, the service was not very successful and was eventually discontinued...

, a modem

Modem

A modem is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data...

 for the Sega Mega Drive 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...

. Other than his sprite, there is little that relates the game with the rest of the Sonic franchise.

The games availability is quite rare due to its Japan-only release and the lack of success of the Sega Meganet. However, a ROM image has been made available on the internet in 2004.

In the versus mode, when a player gets a combination of three consecutive lineups of pieces, that player's 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...

attacks the other player's Sonic. The other player momentarily loses control of his pieces.

The game is on Sega's B-Club download service.

Gameplay modes

The game offers 4 unique modes of gameplay. Normal Mode is an "endless mode" where you Play for points as long as you like. The better the player performs, the higher his or her level will rise and the speed at which clusters fall increases. Doubt Mode is the same as normal mode except that white squares will never fall. Instead, a single shape from almost every cluster will turn into a white square when it hits the ground. Round Mode is a puzzle mode consisting of 10 stages. Each stage has a bunch of swirl shapes interspersed with other normal shapes. Just like the other shapes, the swirls disappear when paired. The object is to clear them all from the play field by eliminating the shapes between them under the time limit. Lastly is Block Mode, which has clusters stand on-end, allowing for massive chain reactions.