Alien Swarm achievements
1,942
(660)

Alien Swarm

3.4 from 62 votes

There are a maximum of 66 Alien Swarm achievements worth 1,942

2,125 tracked gamers have this game, 48 have completed it (2.26%)

Achievement Details

Professional Marksman in Alien Swarm

Professional Marksman38

Kill 250 Swarm with a Marksman Rifle.

  • Unlocked by 150 tracked gamers (7% - TSA Ratio = 3.75) 2,125  
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