Alien Swarm achievements
1,778
(660)

Alien Swarm

3.4 from 81 votes

There are a maximum of 66 Alien Swarm achievements worth 1,778

2,799 tracked gamers have this game, 88 have completed it (3.14%)

Achievement Details

Professional Marksman in Alien Swarm

Professional Marksman34

Kill 250 Swarm with a Marksman Rifle.

  • Unlocked by 244 tracked gamers (9% - TSA Ratio = 3.39) 2,806  
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