I got all of the classic sonics on one convient disc. It seems Nintendo bought out Sega and now Sega makes games for the various nintendo platforms. The disc I have has Sonic 1-4, Sonic Spinball, Dr.Robotnick's Evil Beans, Sonic 3-D, and a couple more I haven't unlocked yet. The theme to Marble Zone on The first Sonic is my favorite of those tunes.