Alien Swarm achievements

32.40%

Scrambled Eggs

Destroy all Swarm Eggs in a mission without allowing any to hatch.

33.29%

Smoking Barrels

Kill 5 Swarm with explosive barrels in a single mission.

35.17%

Parasite Puncher

Kill a Swarm Parasite with a melee attack.

38.40%

Infestation Savior

Cure an Infested marine.

38.40%

Easy Campaign

Complete the Jacob's Rest campaign on Easy difficulty or harder.

44.51%

On the Ready Line

Kill 1,000 Swarm.

45.40%

Close Encounters

Kill 20 Swarm with melee attacks in a single mission.

45.47%

Sharpshooter

Complete a mission with better than 90% accuracy.

48.49%

Clear Firing

Kill 25 drones without friendly fire. Four marines must be present in the mission.

48.95%

Under the Gun

Roll under a Swarm Ranger projectile.

53.93%

Zero Mortality

Complete a mission on Normal difficulty or harder without any marines dying.

59.25%

Protect the Tech

Guard the squad's tech so that he takes no damage during the hack.