Search "Vectrex" in the app store and start playing. It doesn't replicate the graphics in a way I would have liked, but it's still cool. The app is free and comes with Minestorm. For an additional $7 you can buy a "mega pack" of vectrex games. It looks like you get 10-15 titles in the "mega pack." There's some other seemingly cool features too, but I haven't gone deep enough to give this is a thumbs up or not.