Kamakazi Hedchog
This is the hardest Sonic game ever made! If you can survive for even one minute you are some kind of god.
Sonic Advance
This Sonic game for the GBA pits Sonic against Dr. Eggman as the latter tries to turn all of the world's animals into robots. It was the first Sonic game ever officially released on a Nintendo system.
Sonic S Factor
Play as Sonia and Silver as they attempt to fend off Eggman Nega and save the inhabitants of Mobius. Each character has their own special moves. For each character's move list, look underneath the game.
Megaman X2
A team of Maverick Hunters is luring X while Zero is dead (or is he?). In this one, you will fight 8 additional robot masters.
Sonic 2 Delta
Restores the Mega Drive version's deleted scenes, badniks, and prototypes. also a few new bosses