End the three-way battle between yourself, the aliens, and the Cultists. (Downloadable Content)
Eliminate 10 enemies using one of their own turrets. (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)
Finish the Single Player game on Hard Difficulty.
Finish the Single Player game on Insane Difficulty.
Buy a Cheat.
Finish waves 1 through 30 on any map in Infestation.
Buy every Upgrade.
Finish waves 1 through 20 on any map in Infestation.
Finish at least one wave on each map in Infestation.
Finish a 4 player Infestation game beyond wave 9 without anyone bleeding out.
Continue playing to unlock this secret achievement.
Defeat the source of it all.
Make an enemy kill themselves while shooting at your Shell.
Make it through to the lair.
Destroy 100 Pods while piloting the Mantis.
Open up the secret entrance.
Finish waves 1 through 10 on any map in Infestation.
Perform Revival 25 times in Infestation.
Kill an enemy by ramming them with the Inferno GX.
Safely escort Winters through the depths.
Gather 25,000 total salvage.
Listen to 40 Audio Logs.
Find out how to reach the lair.
Keep Berserk active for at least 21 seconds in one use.
Kill 5 enemies in one shot with Impact.
Travel to the Marauder homelands.
Defeat the Mantis.
Kill 100 enemies while in the Marauder Scout Walker.
Destroy the Jamming Devices.
Kill one of each enemy type with the Maul.
Defend the Red Faction.
Use the Magnet Gun to fling debris BACK at a Tentacle.
Make it to the surface.
Destroy the Water Filtration Plant.
Buy out any one Upgrade ring.
Find 200 piles of salvage.
Kill a Wraith before it re-stealths.
Kill 6 enemies in one use of Shockwave.
Send an enemy at least 30 meters with Impact.
Send an enemy at least 50 meters with the Magnet Gun.
Escort the convoy.
Kill 175 enemies while in the L.E.O. exoskeleton.
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 50 Shockwaved enemies before they hit the ground.
Fire an enemy into another enemy with the Magnet Gun.
Remove the Seal.
Gain entry into the Terraformer.
