Ars Technica

Alien Swarm - Free Source Engine co-op mod

Alien Swarm - Free Source Engine co-op mod ShaggyMoose Jul 17, 2010 Jump to latest Follow Reply ...
Kotaku

Valve’s New Shooter, Alien Swarm, Now Available (For Free)

As promised, Valve has released top-down co-op shooter Alien Swarm on Steam, free of charge. Have fun! https://kotaku.com/valve-unleashes-an-alien-swarm-on-steam ...
Kotaku

Alien Swarm

All the Latest Game Footage and Images from Alien Swarm Alien Swarm is a game and Source SDK release from a group of talented designers at Valve who were hired from the Mod community. Available free ...
Ars Technica

Alien Swarm - Free Source Engine co-op mod

Well so far every public game I try to join times out. Sometimes I get to the loading screen and then it just times out after 10 tries. Usually I am stuck looking at "Establishing connection to games.