Finish the Single Player game on Hard Difficulty.
Finish the Single Player game on Insane Difficulty.
Finish at least one wave on each map in Infestation.
Buy a Cheat.
Eliminate 10 enemies using one of their own turrets. (Downloadable Content)
End the three-way battle between yourself, the aliens, and the Cultists. (Downloadable Content)
Kill Mallus. (Downloadable Content)
Get 20 kills with the Sharpshooter. (Downloadable Content)
Wipe out the Cultist military camp. (Downloadable Content)
Get 20 kills with the Shard Cannon. (Downloadable Content)
Reunite Sgt. Winters with the Red Faction. (Downloadable Content)
Rescue the pinned-down Red Faction soldiers. (Downloadable Content)
Clear a safe path to the Terraformer for Hale. (Downloadable Content)
Allow no Red Faction to survive your attacks on their mountain base. (Downloadable Content)
Continue playing to unlock this secret achievement.
Defeat the source of it all.
Buy every Upgrade.
Make it through to the lair.
Destroy 100 Pods while piloting the Mantis.
Open up the secret entrance.
Make an enemy kill themselves while shooting at your Shell.
Safely escort Winters through the depths.
Kill an enemy by ramming them with the Inferno GX.
Listen to 40 Audio Logs.
Find out how to reach the lair.
Kill 6 enemies in one use of Shockwave.
Travel to the Marauder homelands.
Kill 100 enemies while in the Marauder Scout Walker.
Defeat the Mantis.
Destroy the Jamming Devices.
Defend the Red Faction.
Send an enemy at least 30 meters with Impact.
Gather 25,000 total salvage.
Use the Magnet Gun to fling debris BACK at a Tentacle.
Make it to the surface.
Kill one of each enemy type with the Maul.
Kill 175 enemies while in the L.E.O. exoskeleton.
Destroy the Water Filtration Plant.
Find 200 piles of salvage.
Buy out any one Upgrade ring.
Finish waves 1 through 30 on any map in Infestation.
Keep Berserk active for at least 21 seconds in one use.
Finish waves 1 through 20 on any map in Infestation.
Kill 50 Shockwaved enemies before they hit the ground.
Perform Revival 25 times in Infestation.
Send an enemy at least 50 meters with the Magnet Gun.
Escort the convoy.
Kill 5 enemies with one L.E.O. shoulder bash.
Kill 2 other enemies with a single exploding Berserker.
Make it back to civilization.
Perform melee finishers on 25 Creepers (single player only).
Kill 5 enemies in one shot with Impact.
Remove the Seal.
Gain entry into the Terraformer.
Finish a 4 player Infestation game beyond wave 9 without anyone bleeding out.
Finish waves 1 through 10 on any map in Infestation.
Kill a Wraith before it re-stealths.
Fire an enemy into another enemy with the Magnet Gun.
