here is a good game tip for you, Cloudberry kingdom for xbox live arcade. The game is an unique platformer with randomly generated levels and character customization. It's very challenging and it has it's own style and it has 4 player couch co-op and that's only one of the things that make it different from all the other games of the same genre. And it's only like 10-15$ or so, possibly cheaper on the pc, but i wouldn't bet on it, i just assume. Oh, It also has fantastic adrenaline pumping music. (Only 5 tracks, but they are all good so..)