Alien Swarm achievements
1,883
(660)

Alien Swarm

3.4 from 67 votes

There are a maximum of 66 Alien Swarm achievements worth 1,883

2,295 tracked gamers have this game, 57 have completed it (2.48%)

Achievement Details

Professional Marksman in Alien Swarm

Professional Marksman36

Kill 250 Swarm with a Marksman Rifle.

  • Unlocked by 175 tracked gamers (8% - TSA Ratio = 3.62) 2,295  
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