Nintendo 64
Developed by an unknown team under Marigul Management, a video of a game called CatRoots was displayed at E3 2000, but no details were made available. The video shows a red, cartoon cat running from a homicidal mouse attacking it with weapons, including a hammer, ninja stars and a flamethrower. At the end of the video, the cat is pinned and defeated by the mouse's pointed tail, and a Game Over sign is shown, suggesting you played as the cat. The game was never shown or mentioned again.