Seen this screen on Skate 3's Facebook page? You might be wondering how to get Dead Space's Isaac Clark into the game. No, he's not DLC, there's a code for that, actually.
Go to the Cheats section of the Extras menu in Skate 3 and plug in "deadspacetoo" and he's yours. You also get a futuro-skateboard, but it's not transferable to other skaters, it's Ike's and Ike's alone.