Mafia II's a solid game, as reviewed by Cyril and you can get a free copy. Just buy a NVIDIA GeForce GTX 465 card or higher and NVIDIA will furnish you a coupon for a free copy of the game on the PC while supplies last.
Mafia II utilizes the latest in NVIDIA tech such as GeForce 3D Vision and PhysX. So, if you want to play the game on the PC and experience all the cool eye candy, you'll need a 465 card and above to get some good framerates. The following places are providing this offer: