Alien Swarm achievements
1,858
(660)

Alien Swarm

3.3 from 72 votes

There are a maximum of 66 Alien Swarm achievements worth 1,858

2,424 tracked gamers have this game, 52 have completed it (2.15%)

Achievement Details

Professional Marksman in Alien Swarm

Professional Marksman36

Kill 250 Swarm with a Marksman Rifle.

  • Unlocked by 186 tracked gamers (8% - TSA Ratio = 3.58) 2,424  
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