DS

Pac-PixHidden Gesture: Square08/23/05

Nintendo 64

Mario PartyUnlockable Items01/03/06

Online/Browser

Kingdom of LoathingNo name trick08/17/05

Wii

Punch-Out!!Unlock Donkey Kong for Exhibition05/20/09

Xbox

Metal Gear Solid 2: SubstanceSea Lice Rank04/03/06