Alien Swarm achievements
1,945
(660)

Alien Swarm

3.4 from 59 votes

There are a maximum of 66 Alien Swarm achievements worth 1,945

1,940 tracked gamers have this game, 40 have completed it (2.06%)

Achievement Details

Professional Marksman in Alien Swarm

Professional Marksman37

Kill 250 Swarm with a Marksman Rifle.

  • Unlocked by 138 tracked gamers (7% - TSA Ratio = 3.74) 1,940  
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