BloodSlave

Sub Zero Complete the "Arctic Recon" Special Ops mission on Veteran difficulty.

Gest - Chapter XIII Finish the levels from Chapter XIII in Warrior difficulty

Undiscovered Truths Find all the intel hidden in Nightfall.

Big Game Trapper Use a hypno trap to turn a Rhino friendly in Mayday in Regular or Hardcore difficulty.

Postmaster Complete any outpost by activating all of the generators in Regular or Hardcore difficulty.

Discriminating Buyer Use exactly one of each care package in the "Special Delivery" Special Ops mission.

Nahantu Sightseer Explore all of Nahantu.
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Lights Out Complete the "Light 'Em Up" Special Ops mission on Veteran difficulty.

Egg-stra Devastation! Complete the Egg-Stra XP challenge and then destroy a hive in the Devastation DLC package.

Master of the reliquary Gather all the fingers of Frankenstein

A Time of Wood and Stone Gathered the lost lore of Cadash Thaig ("Witch Hunt" downloadable content)

Deliver This Complete the "Special Delivery" Special Ops mission on Veteran difficulty.

Avenged Confronted the culprit behind the Vael family's murder. ("The Exiled Prince" downloadable content)

Memento Gave Sebastian a family heirloom. ("The Exiled Prince" downloadable content)

A Bridge To Somewhere Extend the bridge in Awakening in Regular or Hardcore difficulty.

Acquire Waffle Weapons! Obtain the Ray Gun, DG-2, and the Monkey Bomb at the same time in a game. (Map Pack 3 only)

Flyswatter Destroy all helicopters in the "Vertigo" Special Ops mission.

Skirmish - Chapter XIV Finish the levels from Chapter XIV in Squire difficulty

Pinnacle Complete the "Vertigo" Special Ops mission on Veteran difficulty.

To Jugger or to Jugger-Naut Kill all juggernauts after they land on Veteran difficulty in the "Vertigo" Special Ops mission.

Deadhead Get 150 zombie headshots in a single game. (Map Pack 2 only)

Escaped Awakening Escape Awakening for the first time in Regular or Hardcore difficulty.

Reaper Defeated the Harvester ("The Golems of Amgarrak" downloadable content)

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

Egg-stra Awakening! Complete the Egg-Stra XP challenge and then scan an obelisk in the Invasion DLC package.

Spirited Sparring Kill 500 enemies with Ultimate Skills as a Spiritborn.
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Nightfall Completionist Complete all challenges and kill the Breeder in Nightfall in Regular or Hardcore difficulty.

Turnabout is Fair Play Kill 50 Cryptids with the Venom-X weapon in Nightfall in Regular or Hardcore difficulty.

Cloak and Dagger Met secretly with the agent of the Divine. ("The Exiled Prince" downloadable content)

Upping the Ante Kill the Kraken using a Relic in Mayday in Regular or Hardcore difficulty.

Hat Trick Kill 3 aliens with a single shot from the NX-1 Disruptor in Regular or Hardcore difficulty.

Dog Fight Kill a Gargoyle with the Vanguard in Awakening in Regular or Hardcore difficulty.

Mass Exodus Complete the final Ancestor encounter in Regular or Hardcore difficulty.

Outsourcing Recruit a hireling. You can befriend them or use them as cannon-fodder - we won't judge.

Eggstra Nemesis! Complete the Egg-Stra XP challenge and then activate a generator in the Nemesis DLC package.

Hireling Commander Reach level 10 with all Mercenaries.
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Varterral's Fall Defeated the varterral on Hard or Nightmare difficulty ("Witch Hunt" downloadable content)

Crusade - Chapter XIII Finish the levels from Chapter XIII in Knight difficulty

Hard Time Finish Story Mode on Fixer (Hard) difficulty.

The Architect Successfully build all of the Schematics in Mayday in Regular or Hardcore difficulty.

Mayday Completionist Complete all Challenges and kill the Kraken in Mayday in Regular or Hardcore difficulty.

Splicer God Complete the "Wrath of the Machine" raid on heroic difficulty.

Spelunker Find all of the Intel in Awakening.

Inquisitive Mind Find all of the Intel in Mayday.

Epic victory - Chapter XIII Finish the levels from Chapter XIII in Paladin difficulty

Ogre's Keeper Keep the initial ogre alive as your thrall throughout the entire module. ("Darkspawn Chronicles" downloadable content)

The Final Chapter Find all 7 story related intel files in Exodus.

Loyalty of the Prince Earned either a friendship or rivalry with Sebastian. ("The Exiled Prince" downloadable content)

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

You Wish Hit an Ancestor with a Hypno Knife in Regular or Hardcore difficulty.