CND-STEALTH

Throttled Survival Kill the Breeder while using a Relic in Nightfall in Regular or Hardcore difficulty.

Speed Slayer Kill the Breeder in less than 5 minutes in Nightfall in Regular or Hardcore difficulty.

I Meant To Do That Kill yourself 100 times.

Survived Mayday Kill the Kraken for the first time in Mayday in Regular or Hardcore difficulty.

Pack Addict! Upgrade 5 weapons at the Pack A Punch Machine. (Map Pack 3 only)

Der Meisterbogenschuetze In Der Eisendrache, obtain all of the ancient bows.

Extracurricular Beat any bonus level

Targets Acquired Get past the first gate in Awakening in Regular or Hardcore difficulty.

Five victims helped Help or rescue 5 victims

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

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

Lights Out Complete the "Light 'Em Up" Special Ops mission on Veteran difficulty.

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

Two's Company, Four's a Party Complete any Adventure level with 4 players.

Burgertown Escort Service Rescue 1 survivor in Infection.

Undiscovered Truths Find all the intel hidden in Nightfall.

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

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

Distinguished Service Collect 50 Team Boosts.

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

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

Pinnacle Complete the "Vertigo" 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.

That Party was Ace Ace every Adventure level in The Journey Home.

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

Alright, Alright Survive until round 10 in Infection.

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

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

Defending Our Way Of Life Rescue a hideout.

Survivor Survive until Round 25 in Outbreak.

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

Doctor Heal over 500,000 hit points.

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

Back in Action Perform 10 revivals.

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

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

Sack the Postman Post all 6 invitations for the party.

Collateral Damage Stop a convoy.

Muppet Mastery Complete The Muppet pack's story

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

You know how I said I'll kill you last? Throw Satan off a cliff as Brommando

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

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

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

Hot Brotato Kill a terrorist with a returned grenade

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

Big Top! Achieve a score of 2500 or higher in "Gonzo's Endless Cannon Run Ride!"

Iron and Blood Fight back an ambush.

Pet Sematary Defile the remains of your beloved pet, Behold, in the Main Campaign.

Even Dead Gods Can Die Activate and survive all Dark Altars in the Main Campaign.