The object of the game is to guide one or more mice around a board into one or more goals while avoiding cats roaming the board. The mice and cats all move in predictable paths by always turning right when hitting a wall head on.
ChuChu Rocket! was the first online game for any games console. Due to it simplistic nature, it is regarded as incredibly addictive. The game was given away free with every Dreamcast as a demonstration of its online abilities.