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Frozen Fists Complete Frosted Fjord without having a melee or ranged weapon equipped at any time.

Burgertown Escort Service Rescue 1 survivor in Infection.

Undiscovered Truths Find all the intel hidden in Nightfall.

Back in the Field Acquire the Major's keycard in 'Deep Cover' within 90 seconds without being detected

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

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

Come On And ... Slam 10 zombies at once in Outbreak.

You Can Pet The Dog Pet a Hellhound in MWZ

Repeat Customer Save yourself by using the Death Barter enchantment twice in a single mission.

Alright, Alright Survive until round 10 in Infection.

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

Survivor Survive until Round 25 in Outbreak.

PC Load Letter Use the 3D printer 15 times in a single match in Outbreak.

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

High Wire Act Kill 10 enemies while using a zipline

Heavy Ordinance Specialist Destroy 50 Aerial Scorestreaks with Launchers in Multiplayer

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

Lost In The Snow Complete the Lost Settlement secret mission.

Perkaholic Have 9 perks active at the same time in MWZ

EXTRA: XIX - Heir of Fate Survive 15 min in Inverse Boss Rash with Random Events and Random Level Ups.

That's One Way to Do It... Destroy an airborne enemy helicopter with a Mortar Strike

Not a Fluke Win 10 Blackout games

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

Annihilation Get 100 Elite Zombie Eliminations in Zombies

No Mo' Modi Get out of jail, but not for free

Going Up… In The Darkest Shore, unlock the Ubersprengen.

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

141 Ready Complete the campaign on Veteran

LEGACY Complete all recordings

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

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

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

Nightfall Completionist Complete all challenges and kill the Breeder in Nightfall in Regular or Hardcore difficulty.

Dipped in Gold Purchase all Safehouse and Player Upgrades in Campaign

Team Player In Zombie Rush, obtain a Team Score of 500,000

Queen Firefly Kill 15 enemies with Marlene's assault rifle in one encounter in No Return
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May Your Death Be Swift Win a Daily Run of No Return on Grounded difficulty

Cyberized Research all Augments for 10 Items in Zombies

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

Back From The Dead Reclaim your gear from a Tombstone in MWZ

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

This Make You All Nostalgic? Complete the Part I challenge track in No Return

No Such Thing as Too Many Find and use all Armaments in Open Combat Missions

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

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

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

Bulletproof Find all Plate Carrier Upgrades in Open Combat Missions

Case in Point Complete the Campaign on Veteran difficulty

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

Biology Lesson Kill a Bloater with the pump shotgun as Bill in No Return