Alien Swarm achievements
1,956
(660)

Alien Swarm

3.4 from 62 votes

There are a maximum of 66 Alien Swarm achievements worth 1,956

2,103 tracked gamers have this game, 46 have completed it (2.19%)

Achievement Details

Hat Trick in Alien Swarm

Hat Trick11

Complete 2 co-op missions online. Earns a Team Fortress 2 parasite hat.

  • Unlocked by 1,642 tracked gamers (78% - TSA Ratio = 1.13) 2,103  
Do you have a question about this achievement? Please post it in the Alien Swarm Forum