8-bit Sonic 2
Revenge of Shinobi
Dynamite Headdy
God Hand on Hard. This game is why the hardest setting in Vanquish is called God Hard.
Spyborgs
AD&D: Shadow Over Mystara (1 Credit Clear, no savestates, default settings)
Guardians/Denjin Makai II (1 Credit Clear, no savestates, default settings)