Just about everything NES onwards.
NES, SNES, Genesis, PCE/Turbo/Supergrafx, Jaguar, N64, PS1, PS2, Gamecube, Saturn, Gameboy/GBA, N-gage, X-Box, Old and New PC games, Neo Geo MVS, Sega ST-V, and all other kinds of Arcade boards.
I'm sure I missed something in there, but that is good enough for now. I'm always expanding my collection, and the sale I just had is definitely going to help.