Continue playing to unlock this secret achievement.

Defeat the source of it all.

Make it through to the lair.

Open up the secret entrance.

Kill a Wraith before it re-stealths.

Find 200 piles of salvage.

Make it back to civilization.

Destroy 100 Pods while piloting the Mantis.

Kill 100 enemies while in the Marauder Scout Walker.

Safely escort Winters through the depths.

Find out how to reach the lair.

Remove the Seal.

Gain entry into the Terraformer.

Escort the convoy.

Make it to the surface.

Defend the Red Faction.

Travel to the Marauder homelands.

Defeat the Mantis.

Destroy the Jamming Devices.

Destroy the Water Filtration Plant.

Kill 2 other enemies with a single exploding Berserker.

Buy out any one Upgrade ring.

Fire an enemy into another enemy with the Magnet Gun.

Kill 5 enemies in one shot with Impact.

Send an enemy at least 30 meters with Impact.

Kill 175 enemies while in the L.E.O. exoskeleton.

Gather 25,000 total salvage.

Kill an enemy by ramming them with the Inferno GX.

Send an enemy at least 50 meters with the Magnet Gun.

Perform melee finishers on 25 Creepers (single player only).

Use the Magnet Gun to fling debris BACK at a Tentacle.

Buy a Cheat.

Kill 50 Shockwaved enemies before they hit the ground.

Make an enemy kill themselves while shooting at your Shell.

Finish waves 1 through 20 on any map in Infestation.

Listen to 40 Audio Logs.

Finish waves 1 through 30 on any map in Infestation.

Buy every Upgrade.

Finish waves 1 through 10 on any map in Infestation.

Kill 6 enemies in one use of Shockwave.

Get 20 kills with the Sharpshooter. (Downloadable Content)

Kill Mallus. (Downloadable Content)

Wipe out the Cultist military camp. (Downloadable Content)

Rescue the pinned-down Red Faction soldiers. (Downloadable Content)

Allow no Red Faction to survive your attacks on their mountain base. (Downloadable Content)

Clear a safe path to the Terraformer for Hale. (Downloadable Content)

Reunite Sgt. Winters with the Red Faction. (Downloadable Content)

End the three-way battle between yourself, the aliens, and the Cultists. (Downloadable Content)

Finish a 4 player Infestation game beyond wave 9 without anyone bleeding out.

Finish the Single Player game on Hard Difficulty.

Finish the Single Player game on Insane Difficulty.

Keep Berserk active for at least 21 seconds in one use.

Finish at least one wave on each map in Infestation.

Kill 5 enemies with one L.E.O. shoulder bash.

Eliminate 10 enemies using one of their own turrets. (Downloadable Content)

Get 20 kills with the Shard Cannon. (Downloadable Content)

Kill one of each enemy type with the Maul.

Perform Revival 25 times in Infestation.