Alien Swarm
Revision as of 17:26, 26 February 2014 by Superior97 (talk | contribs) (This Ailien swarm hat can be obtained from this game,you must finish 2 missions)
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Alien Swarm is a top-down shoot-em-up game developed by Valve.
The all class hat Alien Swarm Parasite can be obtained by unlocking the Hat Trick achivment in this game,The achivment requires you to complete any two missions on any difficulty level.
See also
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