Tom Clancy's Rainbow Six: Vegas 2

Rainbow Six Vegas 2 for the PC is the weakest of all the versions due to its poor optimization, broken textures, and questionable AI. However, it still features all the same action and content as its console counterparts, and it's a decent tactical shooter in its own right. Though its flaws and foibles prevent it from being something you'd want to pay the full price for, you could take riskier gambles than putting a couple chips down on Rainbow Six Vegas 2.

So for the friendless few, am I suggesting you don't buy Vegas 2? No. It's never less than engaging, even if you've died a squillion times. Yes there are elements of broken game design that could so easily be fixed, and Ubi's treatment of the Unreal 3 engine is close to abuse with some of the ugliest, blandest textures you'll ever see.

Rainbow Six: Vegas 2 offers much of what the first did on PC, though this time it's wrapped up in a much more stable package, features a better unlock system, and has an expanded set of multiplayer modes. While the single-player feels tired and rehashed, the multiplayer versus modes and options for cooperative play should keep you entertained.