Even if you've only played a handful games with online multiplayer in the past dozen years, chances are that at least a few of your sessions have been powered by Gamespy's back-end tech. On May 31st, the company is shutting down its servers for good, and as a result, a bunch of games are losing their online capabilities. For console games, that largely amounts to multiplayer. For certain PC titles though, that also includes authentication servers for CD keys -- losing those means losing access to the game itself. You probably weren't playing most of what Gamespy's listed anymore (WWE SmackDown vs Raw 2009 on PS3, anyone?), though, and a good deal of what's there are somewhat obscure Wii, DS and PC titles. There are, however, high-profile stand-outs: most anything from Rockstar Games and Activision, or the PS3 version of Borderlands and the hardcore military-sim (and basis for DayZ) ARMA series, for instance.