The president of Sony finds out that a prototype of the Playstation, a joint project with Nintendo, found its way into the public. He goes on a rampage through Sony HQ, destroying everything in his path. Super Boss Gaiden is a homebrew game designed to be played with the Super Nintendo Super Disc, also known as Nintendo Play Station (the only found protype unit). It was released and a Super CD-ROM and was also distributed online in .sfc ROM format. It is playable on the Super Nintendo (even without the SNES CD).