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The Ultimate Sacrifice In Zetsubou No Shima, retrieve the Skull of Nan Sapwe.

It's a Trap! Kill at least one zombie with three different traps in a single round. (Map Pack 2 only)

You Have 5 Seconds to Comply Build a S.H.I.V

Ride the Lightning Build a Firestorm.

Controlled Chaos In Revelations, override all of the Corruption Engines before round 6.

As A Scalpel Earn the "Excellent" rating in every performance category on a terror mission.

Not One Inch In Gorod Krovi, complete a Lockdown Event.

It's a Trap! In Shi No Numa, kill at least one zombie with three different traps in a single round.

Expert Manager Reach B-Spec Level 40.

See All, Know All Build the Hyperwave Relay.

Sanguine Serum In Zetsubou No Shima, drink fresh Widow's Wine.

Big Baller Earn 75,000 points in a single Nazi Zombies game. (Map Pack 2 only)

Not Big Enough In Der Eisendrache, trap and kill a Panzersoldat using the Ragnarok DG-4.

Beyond the Veil Find a soldier with the Gift.

Acted Alone In Verrückt, headshot 20 zombies in the courtyard from the second floor of the Asylum.

Time to Slam In Der Eisendrache, revive two players protected by the Ragnarok DG-4.

The Grand Tour In Revelations, visit every unique location within 2 minutes.

Hoarder Unlock everything in the Archives

And Hell's Coming With Me Successfully assault an Overseer UFO.

Endurance Series Complete Complete the Endurance series of Race Events.

Wield a Fist of Iron In Gorod Krovi, wield the Gauntlet of Siegfried.

All Employees Must Wash Hands... In a single game, complete every Autopsy.

Blown Away In Gorod Krovi, kill 10 zombies at once with the Guard of Fafnir.

My Brother’s Keeper In Der Eisendrache, the one must be erased.

On the Shoulders of Giants Build the Gollop Chamber.

Iron Lung In Zetsubou No Shima, stay underwater for one minute.

Fire Mission In Gorod Krovi, kill 8 zombies with a single Dragon Strike.

Crop Duster In Zetsubou No Shima, kill 10 zombies with a single shot of the KT-4.

One Gun at a Time Staff the Engineering Department with 80 engineers.

One Too Many In Zetsubou No Shima, throw up.

Wardrobe Change In Revelations, wear three different hats.

None Left Standing In Der Eisendrache, kill every type of zombie using a minigun.

Seeds of Doubt In Zetsubou No Shima, the one must be saved.

The Volunteer Make contact with the Ethereal hive mind.

Oppenheimer Staff the Research Labs with 80 scientists.

Assault With Battery In Zetsubou No Shima, electrocute a zombie with a shield.

Iron Breakers Complete the full Operation Iron Horse raid in a group of eight players.

Vaporeyezed In Gorod Krovi, use the Gigant Beam to kill 20 Zombies in one activation.

Cryogenic Slumber Party In Moon, complete Richtofen's Grand Scheme.

Herbal Remedy In Zetsubou No Shima, use a plant to return to life.

Humanity's Savior Beat the game on any difficulty.

Wonderful In Revelations, kill 10 enemies in one shot with each wonder weapon.

Viktorious Revenge In Gorod Krovi, complete all solo Trials in one Zombies game.

Small Consolation In Shangri-La, use the 31-79 JGb215 on each type of zombie.

Web of Defeat In Zetsubou No Shima, remove webs in every possible way in one game.

Time Attack In Gorod Krovi, complete Time Attack: Round 20.

Overachiever In Origins, complete all 4 Challenges in one game.

Bada Boom Kill 50 aliens with explosive weapons.

For The Good Of All In Revelations, the Key must be opened.

Zombiepult In Gorod Krovi, launch 10 zombies into the air at the same time.