Alien Swarm achievements
1,822
(660)

Alien Swarm

3.3 from 76 votes

There are a maximum of 66 Alien Swarm achievements worth 1,822

2,599 tracked gamers have this game, 69 have completed it (2.65%)

Achievement Details

Prototype Professional in Alien Swarm

Prototype Professional19

Kill 250 Swarm with a Prototype Rifle.

  • Unlocked by 698 tracked gamers (27% - TSA Ratio = 1.92) 2,599  
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