Valve has surprised the world with an unusual announcement. This is the title Alien Swarm, which uses the Source engine from Valve itself. But more surprising is that the game will be available today and will be free. As if all this were not enough, the studio has decided to distribute the source code also free to set an example to take advantage of Steamworks. Regarding the game itself, Alien Swarm is a cooperative action game overhead perspective.
Alien Swarm history dates back to 2004. Then it was a mod for Unreal Tournament 2004 developed by Black Cat Games. A year later, the study reported their intention to release another free of charge and another commercial, this time using the Source engine. In September 2007 the study disappeared without a trace. Now Valve has stated that hired the development team to work on the series Left 4 Dead and Portal 2, but still the boys from Black Cat found time to complete this Alien Swarm.
StGGamers 