So my neighbor got me this game used for my birthday. now i have Slim that's newer than his elite 360, but i don't have a hard drive for my 360, he does. He was able to get this game working without a problem. Do I need to have a hard drive in the 360 in order to play this game? that's the only thing i can think of that would cause this game to not play where i have not had a problem with any other game i have tried playing.