Alien Swarm achievements
1,776
(660)

Alien Swarm

3.3 from 86 votes

There are a maximum of 66 Alien Swarm achievements worth 1,776

3,067 tracked gamers have this game, 92 have completed it (3.00%)

Achievement Details

Professional Marksman in Alien Swarm

Professional Marksman34

Kill 250 Swarm with a Marksman Rifle.

  • Unlocked by 265 tracked gamers (9% - TSA Ratio = 3.42) 3,081  
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