Play Sonic 3 and Sonic & Knuckles 20 times. Flicky : Play Mean Bean Machine 30 times.
In Angel Island 1, press Left(3), Right(3), Up(3). Additional Resources
Play Sonic 2 and Sonic Spinball 20 times. Sonic Mega Collection Plus
Unlock additional games by opening and exiting specific titles multiple times, returning to the main menu each time: Play Sonic 1 and Sonic 3D Blast 20 times.
Up, Down, Left, Right (chime), then hold Square/X and Start. Play Sonic 3 and Sonic & Knuckles 20 times
Original Sega Genesis cheats work, using (PS2), B/X (Xbox), or PC keys:
is a compilation of classic SEGA titles originally released for PlayStation 2, Xbox, and PC. This guide covers how to unlock hidden games and use classic cheats. Unlocking Hidden Games Additional Resources Play Sonic 2 and Sonic Spinball
Play Genesis games 50 times, or have a Sonic Heroes save file. The Ooze : Unlock the above or use a Sonic Heroes save. Classic Game Cheats