TF2 is free to play this weekend and only 9.99 but wait.

[Judas Deceit]

need a 360? an elite with 12 months of live, and your choice of assassins creed 2 and either modern warfare 2 or left 4 dead 2 can (2 games free) for 349 from walmart.

Also did you like Diablo 1 or 2? Torchlight- an amazing diablocraft of a game is now available from steam for 9.99 totally worth it.

there is a coop game of physics and magic for the pc that can be played on the same system ( think usb controllers like 360 pads ) called Trine. Other than being aesthetically beautiful its amazing fun and like i said 3 people can play on the same pc. You can get on it D2D or just like any of the previously mentioned PC titles free of charge if you know where to look.

TF2 single player however I must recommend against as there is none lol.