Alien Swarm achievements
1,883
(660)

Alien Swarm

3.4 from 67 votes

There are a maximum of 66 Alien Swarm achievements worth 1,883

2,294 tracked gamers have this game, 57 have completed it (2.48%)

Achievement Details

Prototype Professional in Alien Swarm

Prototype Professional20

Kill 250 Swarm with a Prototype Rifle.

  • Unlocked by 552 tracked gamers (24% - TSA Ratio = 2.03) 2,294  
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