My impression was that the Alien Swarm guys are also the guys who started L4D back when it was originally going to be a mod. Valve picked up the L4D IP and kept them on as developers, so they're Valve ...

Wow, here's a Friday surprise. Valve just announced that it's releasing a full version of Alien Swarm, a co-operative shooter based on an old Unreal Tournament 2004 mod, next week. And it’s free. Keep ...