Reach Commander (Level 55) in Multiplayer while playing online.
In Verruckt, headshot 20 zombies in the courtyard from the second floor of the Asylum.
In Ascension, escape on all three lunar landers.
In Shadows of Evil, kill 5 Parasites while riding on the train.
Kill 3 Talons with a single mid-air grenade detonation.
Kill three enemies in a melee combo.
In Campaign, kill 5 enemies with 5 different guns in under 30 seconds.
In Campaign, kill 20 enemies while flying the same Talon.
Hack the Data Vault and brace yourself for Cyber's Avengening in Dead Ops Arcade 2.
Get 5 Medals based on a Specialist Ability in a single game.
Complete the Campaign on Realistic.
Complete the Campaign on any difficulty.
Complete Campaign on Hardened, Veteran, or Realistic.
Complete Lotus Towers on Hardened, Veteran, or Realistic.
In Moon, prevent each excavator from breaching the base in one game.
In Shadows of Evil, kill 10 zombies that are inside of a store in one game.
In Gorod Krovi, launch 10 zombies into the air at the same time.
Kill 5 enemies using one burst of Unstoppable Force.
In Shadows of Evil, purchase and chew every type of GobbleGum in your Pack.
In Kino Der Toten, visit every location the teleporter can take you to.
In Ascension, kill a space monkey with a fire trap.
In Shi No Numa, kill at least one zombie with three different traps in a single round.
Get a Specialist-based medal that requires 3 or more rapid kills while using any Specialist Weapon.
In Campaign, unlock all camos for any weapon.
Fully upgrade a Cybernetics Core.
Complete Sand Castle on Hardened, Veteran, or Realistic.
In Campaign, kill 5 enemies from over 100m away.
Take control of an ASP.
Complete Demon Within on Hardened, Veteran, or Realistic.
In Campaign, kill 5 stunned enemies in under 3 seconds.
Complete Rise and Fall on Hardened, Veteran, or Realistic.
In Campaign, wall run over 250 meters.
Complete Vengeance on Hardened, Veteran, or Realistic.
Complete Hypocenter on Hardened, Veteran, or Realistic.
Complete Provocation on Hardened, Veteran, or Realistic.
In Campaign, unlock all attachments for any weapon.
Kill 6 enemies affected by one Blinding Swarm or Firefly Swarm.
Complete In Darkness on Hardened, Veteran, or Realistic.
Complete New World on Hardened, Veteran, or Realistic.
Use an enemy combat robot to kill 10 enemies.
Complete Black Ops on Hardened, Veteran, or Realistic.
In Campaign, kill 10 enemies in under 3 seconds.
In Campaign, kill an enemy through a wall or obstruction.
Reach Sergeant (Level 10) in Multiplayer while playing online.
In Origins, complete all 4 Challenges in one game.
In Nacht Der Untoten, do not let any zombies enter the building during the first 3 rounds.
Discover all of the collectibles in the Campaign
Earn all Decorations.
Discover all of the collectibles in any Mission.
Earn a Gold Rating in the training simulator.
In Shadows of Evil, complete all Rituals.
In Shadows of Evil, spot the Shadowman fives times in one game.
In Shadows of Evil, use the rocket shield attack to kill at least 10 zombies in one burst.
In Shadows of Evil, summon the Civil Protector in every district in a single game.
In Shadows of Evil, kill 10 zombies ensnared by a Widow's Wine grenade
In Shadows of Evil, kill 2 Margwas in a single round.
In Der Eisendrache, the one must be erased.
In Der Eisendrache, obtain all of the ancient bows.
In Der Eisendrache, kill every type of zombie using a minigun.
In Der Eisendrache, upgrade the Wrath of the Ancients.
In Der Eisendrache, trap and kill a Panzersoldat using the Ragnarok DG-4.
In Der Eisendrache, revive two players protected by the Ragnarok DG-4.
In Der Eisendrache, wallbuy the BRM.
In Der Eisendrache, electrocute 121 zombies.
In Der Eisendrache, use every Wundersphere twice.
In Der Eisendrache, kill a zombie while being flung by a Wundersphere.
In Zetsubou No Shima, the one must be saved.
In Zetsubou No Shima, drink fresh Widow's Wine.
In Zetsubou No Shima, use a plant to return to life.
In Zetsubou No Shima, retrieve the Skull of Nan Sapwe.
In Zetsubou No Shima, kill 10 zombies with a single shot of the KT-4.
In Zetsubou No Shima, stay underwater for one minute.
In Zetsubou No Shima, survive getting consumed.
In Zetsubou No Shima, electrocute a zombie with a shield.
In Zetsubou No Shima, remove webs in every possible way in one game.
In Zetsubou No Shima, throw up.
In Gorod Krovi, the one must be freed.
In Gorod Krovi, wield the Gauntlet of Siegfried.
In Gorod Krovi, complete Time Attack: Round 20.
In Gorod Krovi, ride a Dragon.
In Gorod Krovi, complete a Lockdown Event.
In Gorod Krovi, complete all solo Trials in one Zombies game.
In Gorod Krovi, use the Gigant Beam to kill 20 Zombies in one activation.
In Gorod Krovi, kill 8 zombies with a single Dragon Strike.
In Gorod Krovi, kill 10 zombies at once with the Guard of Fafnir.
In Revelations, the Key must be opened.
In Revelations, complete the cycle.
In Revelations, recover the Pack-a-Punch machine from its abductor.
In Revelations, assist a Keeper in defeating every type of enemy.
In Revelations, kill 40 enemies with a single activation of a Corruption Turret.
In Revelations, visit every unique location within 2 minutes.
In Revelations, wear three different hats.
In Revelations, kill 10 enemies in one shot with each wonder weapon.
In Revelations, override all of the Corruption Engines before round 6.
In Shangri-La, acquire the Focusing Stone.
In Shangri-La, use the 31-79 JGb215 on each type of zombie.
In Moon, complete Richtofen's Grand Scheme.
In Origins, release Samantha.
