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

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

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

Specter Officer Reach max level with one class in the Cooperative campaign.

A for effort Attain a Time Trial star rating of 35

Z-Genocider 2: Genocide Harder Kill 53,596 zombies

Provocateur Collected and assembled the Battledress of the Provocateur. ("Leliana's Song" downloadable content)

Bug Spray Earn the Distinguished Flying Service Cross

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

Factory Zero You survived Hei Zhen Zhu and RBS using no Praxis kits, weapons, grenades or mines. Whoa.

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

Heavy Medals Earn All Medals

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

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

Death of Comedy Use every type of novelty weapon on a zombie

Keeper of the Vigil Saved Vigil's Keep ("Dragon Age: Origins - Awakening" expansion)

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

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

The Cleaner Escape as a traitor with 50% of any level’s total loot in Arcade Mode or Multiplayer Ranked Match.

You Want Blood? 1000 kills.

Bane of Thedas Handed victory to the archdemon by killing Ferelden's last Grey Warden. ("Darkspawn Chronicles" downloadable content)

Salute Me Achieve the rank of Lieutenant.

Campaign Kitty Obtain all 108 medals on the original Arkham City campaigns (as Catwoman)

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

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

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

Vendetta Destroyed the career of Guard Captain Eams. ("Leliana's Song" downloadable content)

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)

Duct Tape FTW Create all combo weapons

Still counting Attain a Time Trial star rating of 50

Got Your Back Revive your Co-Op partner 10 times.

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

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

Zombie Genocide Master Kill 72,000 zombies

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

Chapter 2 Speedrun Complete a Speedrun of Chapter 2 below the target time.

Chapter 4 Speedrun Complete a Speedrun of Chapter 4 below the target time.

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.

Chapter 3 Speedrun Complete a Speedrun of Chapter 3 below the target time.

Undiscovered Truths Find all the intel hidden in Nightfall.

Chuck Greene: Cross-dresser? Change into all pieces of clothing in the game

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.

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

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

Chapter 6 Speedrun Complete a Speedrun of Chapter 6 below the target time.

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

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