Alien Swarm achievements
1,853
(660)

Alien Swarm

3.3 from 71 votes

There are a maximum of 66 Alien Swarm achievements worth 1,853

2,362 tracked gamers have this game, 63 have completed it (2.67%)

Achievement Details

Hat Trick in Alien Swarm

Hat Trick11

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

  • Unlocked by 1,921 tracked gamers (81% - TSA Ratio = 1.10) 2,362  
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