Kimbo Slice is one of the celebrity guest characters on the new FaceBreaker video game for Xbox 360, PlayStation 3, and Nintendo Wii.
FaceBreaker is a boxing/fighting video game with cartoony characters that allows players to break their opponents faces with a "real-time facial deformation" feature. It was released in September 2008.
Kimbo Slice is a perfect character for a game like this because he is a real life facebreaker himself!
Other celebrity guest characters are Heidi Montag, Spencer Pratt, Kim Kardashian, Peter Moore, and Snoop Dogg. I wouldn't say any of these are bad for the game but none are quite as fitting for it as Kimbo Slice is.