Alien Swarm achievements
1,767
(660)

Alien Swarm

3.4 from 81 votes

There are a maximum of 66 Alien Swarm achievements worth 1,767

2,843 tracked gamers have this game, 92 have completed it (3.24%)

Achievement Details

Hat Trick in Alien Swarm

Hat Trick11

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

  • Unlocked by 2,440 tracked gamers (85% - TSA Ratio = 1.08) 2,854  
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