Zero_Ace

Downforce Completionist Gain all stars in 'Downforce'.

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

Midnight Completionist Gain all stars in 'Midnight'.

Lamborghini Completionist Gain all stars in 'Lamborghini'.

Untouchable Use only one self revive care package in the "Special Delivery" Special Ops mission.

Missed me! Defeat a boss on any difficulty level without taking damage

dr0n3d Complete the "Arctic Recon" Special Ops mission in under 3:30.

Fertilizer Man Kill 200 zombies in a single game. (Map Pack 2 only)

High Roller Complete the "Iron Clad" Special Ops mission on Veteran difficulty.

Bug tracker! Kill 500 bugs in the game!
"Thanks for your help!"

Who's Laughing Now? Go into the final round of a championship in third place or lower, and emerge as overall champion.

JACKPOT!! Win the $10,000 jackpot on the slot machines.
"You won the Grand Prize!"

Elements Completionist Gain all stars in 'Elements'.

Horsepower Completionist Gain all stars in 'Horsepower'.

Big Brawler Get 10 consecutive zombie melee kills before Insta-Kill expires. (Map Pack 2 only)

On the Clock Completed the training in Through the Eyes of Evil in under 18 seconds

Weapon Collector Collect 8 weapons!
"You got a full armoury!"

RPM Completionist Gain all stars in 'RPM'.

Pea Shooter Kill a Rhino with only a pistol in Nightfall in Regular or Hardcore difficulty.

Perk-a-Holic Have all four perks simultaneously active in a game of Nazi Zombies. (Map Pack 2 only)

Moneybags Have 15000 credits in the bank in Outbreak.

Turbocharged Completionist Gain all the stars in 'Turbocharged'.

Perkaholics Anonymous! Survive until round 20 without buying a single Perk. (Map Pack 3 only)

Deer in the Headlights Stab five stunned enemies in a row in the "Light 'Em Up" Special Ops mission.

40 Knives! Kill 40 zombies with the bowie knife. (Map Pack 3 only)

One-Make Wonder Win Come from behind to win right at the finish line of a one-make race.

Lamborghini Icons Completionist Gain all the stars in 'Lamborghini Icons'.

Burgle Burgle Burgle Steal 10 kills from a teammate in Outbreak.

Hard Times To escape death is to beat the strongest of the strong. Finish Arcade Mode on Hardest, kid!

Frequent Flyer! Use the teleporter 8 times. (Map Pack 3 only)

Unite In Speed Completionist Gain all stars in 'Unite In Speed'.

Soul Survivor Reach round 15 in Nazi Zombies without getting revived. (Map Pack 2 only)

Team Player A 1-on-1 fight is fun, but it's more fun with friends! Try fighting in a Team Battle!

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

Pacesetter Completionist Gain all stars in 'Pacesetter'.

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

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

Velocity Completionist Gain all stars in 'Velocity'.

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

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

Evolution Completionist Gain all stars in 'Evolution'.

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

I Got This In The Darkest Shore, survive the initial beach rush without using any machine gun turrets.

Undiscovered Truths Find all the intel hidden in Nightfall.

The Spider's web Defeat 50 enemies using the Amazing Charge Attack

Burgertown Escort Service Rescue 1 survivor in Infection.

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

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

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

Torque Completionist Gain all stars in 'Torque'.