Walxir

A Dark Doorway Recover the Psi Gate

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

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

Chasing the Game Lured and killed an alpha wyvern near Chateau Haine. ("Mark of the Assassin" downloadable content)

Grim Reaper Defeated the Harvester on Hard or Nightmare difficulty ("The Golems of Amgarrak" downloadable content)

An ace up your sleeve While spectating a match in Tactical View in Manager Career, jump in and score a goal

Illithid Enclave Complete the quest: Illithid Enclave

Infernal Jungle Collect 10,000 Aberrant Cinders in Nahantu Helltides.
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Meat Over Metal Kill a Sectopod on the same turn you encounter it (in Single Player)

Goblins Defeat 500 Goblins

Maximum Overdrive Equip an Overclock on a Lethal, Tactical, Field Upgrade and 3 Scorestreaks at once

Hoarder Complete all 6 Calling Card Challenges in any Zombies Category

Tenuous Grasp Find and then lose something valuable

Sudden Temptation Quick Battle: defeated all warriors.

Job Security Complete Sector 003 - Security Crackdown

Golden Generation Hire an Expert level coach for each department in your club

Karlan Engineering Destroy a Karlan controlled Siege Mech

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

Devils Defeat 500 Devils

Vice Express Take the train

Professor's Diploma Beat the five base Challenges on Hard difficulty.

I Live…Redux Incapacitate, hotswap, and revive yourself.

MEAT IS MURDER Activate Bubby.

Last man standing Beat a heist after having been the only one alive. (4 teammates).

Little Lost Girl In Origins, release Samantha.

We Have Each Other Defeat Fuxi and Nuwa.

10 Days Without Incident Complete 10 crises with full evacuation.
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Defeat the Grub Buster Defeat the Grub Buster in the Mole Town Arena

Not so special Take down a member of Zell's guard

Must Be Bored Complete all dungeons on Legendary difficulty

Genius Destroyer Defeat Monsoon without taking any damage on Hard difficulty or above.

Clairvoyant Use the Oculus (Single Player Campaign)

This Is My Rifle Earn any Arclight, Moonstone, or Bloodstone Camo

Dripped Out Earn Diamond Badges for any category of Mastery Badges

Sage's Diploma Beat the five base Challenges on Bananas difficulty.

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

Advanced Robotics You purchased a Mod in every tier for Bosco.

Lizardfolk Defeat 500 Lizardfolk

This Damn Island In The Darkest Shore, explore the entire island.

A Better Tomorrow In Revelations,complete the cycle.

Let's Rock! Complete the game on Human mode as Nero, Dante, or V.
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Decibel Domination Use the BOOMbox to taunt ten enemies at once.

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

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

Coast 2 Coast Cross the water with a teleport grenade in Descent.

Velocity: On Final Approach Unlock either Jump Nitrous PRO or Drift Tires PRO (Multi)

Windowlicker Defeat a law enforcer planting C4 in FIRST WORLD BANK on hard difficulty or above. To complete this challenge, you will have to have played the heist from the start.

How low can you go? Hit 18 enemies with a single shot of the LZ-52 Limbo in Carrier.

Best of Five Play 5 H2H matches with a friend in Kick Off

How the mighty have fallen! Defeat Oz... again in Descent.