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

Viva la Resistance! Solve every side-quest in the Secret Lair.

Heart Of Iron Achieve Rank 15.

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

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

The Highest Office In Classified, reach round 20 without using an elevator

Zombie Fanatic In Blackout, unlock Bruno, Scarlett, Diego, Shaw, Dempsey, Takeo, Nikolai and Richtofen

Hijacker Complete the orichalcum shipment quest.

Prestigious Award Attain max level or Prestige with 25 different weapons in Zombies

Captive Complete mission: Captive

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.

Blackout Historian In Blackout, unlock Reznov, Mason, Woods and Menendez

Unfulmigator Eliminate Fulmigati's doomsday machine.

Preemptive Strike In Classified, kill 50 Nova 6 Crawlers without letting them explode in a single game

Little Lost Girl In Origins, release Samantha.

Future best friend ? Let Brickjaw live in Koloss 44

Crawl for Help In Classified, while in last stand use a teleporter and then get revived in a single game

A Better Tomorrow In Revelations,complete the cycle.

Ground Control In Moon, prevent each excavator from breaching the base in one game.

Senseless Axe of Violence In Blood of the Dead, kill 5 zombies with the Hell's Redeemer before it starts its return

Pent-up-agon In Classified, complete 5 consecutive rounds without leaving the war room elevator in a single game

Soul Reaper Win 10 Team Deathmatch quickplay matches.

Love And War In Gorod Krovi, the one must be freed.

Natural Order Complete any special operation on Easy difficulty.

Six Seasons and a Movie Answer 50 questions correctly in the Entertainment category.

Approaching the Apocalypse Defeat final Arbiter on Apocalypse Tier 25.

On the Clock In Dead of the Night, stay within the clock circle until the time runs out

Explorer Visit all locations.

Within the Walls Complete mission: Within the Walls

EcoLocation Visit the Overgrown City EcoPod

Ringbender Complete the Bendring Ark location

Recondite Complete the Recondite Ark location

Going Everywhere Fast In Classified, use a teleporter 7 times in less than a minute in a single game

Slaughter to the Lamb Complete mission: Slaughter to the Lamb

Means to an End Complete mission: Means to an End

Friend of Ford Complete the Reclaim & Rebuild Project

Breaking the Ice In Classified, shatter 115 zombies in a single game

Shock Value In Classified, kill 115 zombies with electric traps in a single game

The Floor Is Lava! Get 30 kills with claymores or mines in Co-op or Versus.

Quick Thinking In Dead of the Night, unlock the Forest by round 7

Keep Close In Revelations, assist a Keeper in defeating every type of enemy.

Time Travel Will Tell In Shangri-La, acquire the Focusing Stone.

Step on the Gas In Classified, kill 50 zombies while affected by Nova 6 Crawler gas in a single game

The Fall of Icarus Destroy a Helicopter.

Cold War Remedy In Classified, retrieve and equip the Project Skadi prototype

Questionable Sanctity Complete all Ghost Sanctuaries in Overgrown City

Doing Science and Still Alive Answer 50 questions correctly in the Science & Nature category.

Hunting for Sport Answered 50 questions correctly in the Sports & Leisure category.

Dog of War Collect 9 dog tags in Battle Royale or Gauntlet.