Alien Swarm achievements
1,822
(660)

Alien Swarm

3.3 from 76 votes

There are a maximum of 66 Alien Swarm achievements worth 1,822

2,606 tracked gamers have this game, 70 have completed it (2.69%)

Achievement Details

Hat Trick in Alien Swarm

Hat Trick11

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

  • Unlocked by 2,270 tracked gamers (87% - TSA Ratio = 1.06) 2,606  
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