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

2,600 tracked gamers have this game, 69 have completed it (2.65%)

Achievement Details

Professional Marksman in Alien Swarm

Professional Marksman35

Kill 250 Swarm with a Marksman Rifle.

  • Unlocked by 215 tracked gamers (8% - TSA Ratio = 3.48) 2,600  
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