Alien Swarm achievements
1,909
(660)

Alien Swarm

3.4 from 65 votes

There are a maximum of 66 Alien Swarm achievements worth 1,909

2,211 tracked gamers have this game, 50 have completed it (2.26%)

Achievement Details

Perfect in Alien Swarm

Perfect34

Complete a mission on Normal difficulty or harder without receiving any damage.

  • Unlocked by 193 tracked gamers (9% - TSA Ratio = 3.39) 2,211  
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