An epic bug hunt featuring a unique blend of co-op play and squad-level tactics. With your friends, form a squad of four distinct IAF Marine classes. Plan your attack using an unlockable arsenal of weapons with countless loadout configurations against a wide variety of aliens. Blaze your way through an overrun, off-world colony, eradicating the alien infestation in environments ranging from the icy planet's surface, to a subterranean lava-flooded mining facility.
A new UDK! Valve have launched their new SDK without access restrictions, allowing TC Source mods to become totally free – no purchase necessary.
Posted by Varsity on Jul 19th, 2010
Perhaps ironically for a game that started out on the Unreal Engine, Alien Swarm has turned out to be Valve's response to the Unreal Development Kit. It isn't quite as tidy a package as UDK - as a Steam account and 2GB download are required before mods can be played - but it's pretty close, and Steamworks fills in the indie licensing side of the equation. Like UDK however, there is a limited supply of content: Source's standard HL2 materials, models and sounds are not available.
In related news, Swarm documentation has gone up on the Valve Developer Community. Included is a guide to mapping (with the new TileGen as well as in Hammer), and a C++ code overview.
Oh yeah: the game is out too.