I have pretty good luck with MAME emulation, but the Wiz is pretty picky. I found a nice ROM package online and most of the games work. I think however that you will find that there are many other things you can do with the Wiz and that you'll find yourself doing other things besides just MAME. I love mine. I play it so often I have to recharge almost daily. One of the coolest things I've gotten in a long time.