I was playing a game of Uno Attack and one of our players had an x card and another card the same color and went out.Did not say Uno. I said you can't do that and you must disk card one of those cards and say Uno not duice.I lost the battle with the other players and another player did it later in the game also. I said the name of the game is Uno and the rules say you must warn the other players when you have one card left.They way they want to play is if I had 4 cards the same color and an x I can go out and then say Uno I'm out