Alien Swarm achievements

59.75%
Seal of Quality
Seal a door with the welder.
66.75%
Shield Down
Deliver the finishing blow to a Swarm Shieldbug.
67.71%
Quick Load
Successfully perform a fast reload.
73.89%
Quick and Dead
Kill a Swarm Boomer before it inflates.
87.96%
Hat Trick
Complete 2 co-op missions online. Earns a Team Fortress 2 parasite hat.
89.70%
Technician Secured
Finish a mission without the tech getting killed.
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