A Grand Theft Auto modification lets you play as Marty McFly! And yes, that means you’re driving a DeLorean with a Flux Capacitor at 88 miles per hour. No, you can’t just download this -yet. YouTube member seedyrom34 worked for months on this custom mod. You’ll find a lot of links on the YouTube page, and there’s a forum about the Back To The Future: Hill Valley project.