Alien Swarm achievements
1,763
(660)

Alien Swarm

3.3 from 84 votes

There are a maximum of 66 Alien Swarm achievements worth 1,763

3,008 tracked gamers have this game, 92 have completed it (3.06%)

Achievement Details

Hat Trick in Alien Swarm

Hat Trick11

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

  • Unlocked by 2,681 tracked gamers (89% - TSA Ratio = 1.05) 3,022  
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