ChuChu Rocket!

ChuChu Rocket! (チューチューロケット!) is a puzzle game for Dreamcast developed by Sonic Team. The game was the first popular game with online mode support for any major video game console. The game was later given away free with every Dreamcast to demonstrate its online abilities, and also given away free to European console owners, who could order a copy by connecting to the Dreamarena online service with the Dreamcast browser.

The object of the game is to place arrows that guide one or more mice ("ChuChus") around a board into one or more goals, while avoiding cats ("KapuKapus") roaming the board. The mice and cats all move in predictable paths by always turning right when hitting a wall head on, by following corners or by turning around when in a dead end.