Only 15 Live-enabled PC games have been released in the almost two years since Games for Windows Live debuted. Games For Windows Live could get one potentially huge addition later this year, though: Rocksteady Studios' Batman: Arkham Asylum.

Given how few Games for Windows Live games there are, I'll understand if that revelation's meaningless to you. What it means is that playing Batman: Arkham Asylum on the PC will earn you Achievements. Arkham's a single-player game so it won't really make use of Windows Live's other big feature: online match-making.

Batman: Arkham Asylum will be released this summer for Xbox 360, PS3, and PC.