G.I. Joe: The Rise of Cobra features a dozen playable Joes along with four playable Cobra characters. You won't be able to use all of these from the start. In fact, when you first boot up G.I. Joe, you'll only have access to Duke and Scarlett. Some of the other characters become available just by playing through the various missions. Cobra has captured a number of Joes, including Heavy Duty. You're going to like Heavy Duty. He has a chain gun. 'Nuff said.