Alien Swarm achievements

Alien Swarm

3.3 from 72 votes

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

2,422 tracked gamers have this game, 52 have completed it (2.15%)

Achievement Details

Short Controlled Bursts in Alien Swarm

Short Controlled Bursts23

Complete a mission with no friendly fire incidents. Four marines must be present in the mission.

  • Unlocked by 461 tracked gamers (19% - TSA Ratio = 2.27) 2,422  
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