ChuChu Rocket! is an action puzzle game developed by Sonic Team and published by Sega. Released for the Dreamcast in 1999, it was the first game for the system to support online console gaming. Players must place arrows on a board to lead mice into escape rockets while avoiding cats. The game features single-player modes in which a player must save all the mice on a board, and a multiplayer mode in which players battle to collect the most mice.