Alien Swarm Wiki

Professional Marksman

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Professional Marksman
Professional Marksman
Difficulty Easy
Description Kill 250 Swarm with a Marksman Rifle.
Repeatable No

Professional Marksman is a Steam Achievement that requires you to kill 250 Swarm with a Marksman Rifle.


  • The Cargo Elevator mission is a perfect place for this weapon; press your alt-fire to open the sights and you can kill the drones climbing the walls in one shot.

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