You proably haven't heard of this title before. You know why? Cause it was NEVER released. There's one known copy in existence to this day, and it's already been sold for more then 300 grand. That's alot of money. Sonic X-Treme was ment to be the Saturn's main Sonic game, but it was doomed from day 1. First of all, Sonic Team cursed the existence of the game. Staff switches took their toll. Finally, it was down to only one team that was working on the game. Most people from that team quit, and the boss got sick cause of his undying dedication to get that game finished. He came down with Pneumonia and had to stop working on the game to be treated. Finally, the game was just canceled.