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

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 ...

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 ...

The designers at Valve aren’t particularly prolific when it comes to games, but what they lack in volume they more than make up for in passion and polish. While big titles like Portal and Team ...

It was fun, if frustratingly hard at times. ++ On a tangent, HexRei and I tried Alien Breed as well, though it's totally unplayable due to an only two-person person co-op, the brutally hard gameplay ...