Alien Swarm achievements
1,832
(660)

Alien Swarm

3.4 from 76 votes

There are a maximum of 66 Alien Swarm achievements worth 1,832

2,477 tracked gamers have this game, 60 have completed it (2.42%)

Achievement Details

Hat Trick in Alien Swarm

Hat Trick11

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

  • Unlocked by 2,185 tracked gamers (88% - TSA Ratio = 1.06) 2,477  
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