Alien Swarm achievements
1,853
(660)

Alien Swarm

3.4 from 70 votes

There are a maximum of 66 Alien Swarm achievements worth 1,853

2,351 tracked gamers have this game, 61 have completed it (2.59%)

Achievement Details

Prototype Professional in Alien Swarm

Prototype Professional20

Kill 250 Swarm with a Prototype Rifle.

  • Unlocked by 568 tracked gamers (24% - TSA Ratio = 2.03) 2,351  
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