Sonic Gems Collection USA

the ntsc-j version came with 3 extra unlockable games

This game contains 3 of the rarest and most sought after Sonic games in today's time: Sonic CD, Sonic-R, and Sonic the Fighters (Sonic Championship in its limited international release). Also included are two Sega Genesis (Megadrive in Europe) games of the same caliber, Vectorman and Vectorman 2; and the final Bosses for several Game Gear games. Originally intended to be included were two even more obscure Sonic games: SegaSonic the Hedgehog, a trackball controlled isometric game in Sonic 3D Blast territory, including two other characters - the never since used Ray the Squirrel and Mighty the Armadillo; and Knuckles Chaotix, a Sega 32x game that had the player control two characters bound by a rubber band, and contained 3 new characters that later came to be known as Team Chaotix. On a personal standpoint, I think this is one great collection, one no Sonic fan should miss out on.