Alien Swarm achievements
1,796
(660)

Alien Swarm

3.3 from 79 votes

There are a maximum of 66 Alien Swarm achievements worth 1,796

2,729 tracked gamers have this game, 81 have completed it (2.97%)

Achievement Details

Hat Trick in Alien Swarm

Hat Trick11

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

  • Unlocked by 2,340 tracked gamers (86% - TSA Ratio = 1.07) 2,734  
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