Alien Swarm achievements
1,914
(660)

Alien Swarm

3.4 from 64 votes

There are a maximum of 66 Alien Swarm achievements worth 1,914

2,205 tracked gamers have this game, 49 have completed it (2.22%)

Achievement Details

Prototype Professional in Alien Swarm

Prototype Professional21

Kill 250 Swarm with a Prototype Rifle.

  • Unlocked by 523 tracked gamers (24% - TSA Ratio = 2.05) 2,205  
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