Steam often runs sales and specials, and this one from Square Enix happens to include two LIVE enabled titles for PC.

Battlestations: Pacific (PC) - $29.99/£13.99 $14.99/£6.99
Kane & Lynch: Dead Men (PC) - $14.99/£7.99 $7.49/£3.99

The Square Enix sale is going on now through March 26th. You will need the Games for Windows LIVE client for your computer if you want to earn achievements, which can be downloaded here.