Not all , but you can play NES,SNES,SMS,GENESIS , MAME. Actually i've played these kind of systems when i used to have a PS2. Now at that time a GBA emu was already made about 33% ,i don't know by now. Anyway a XBOX(not XBOX 360) can play a whole lot more systems. Like the PS2 , the XBOX also needs to be modded.