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Retribution Dealt with the mercenaries that killed the Vael family. ("The Exiled Prince" downloadable content)

It's just a scratch Complete THE TWO COLONELS Chapter without using any Medkits on Normal or higher difficulty.

Great Owl Find all the Night Hunters' secret stashes in the SAM'S STORY chapter.

Have you tried turning it off and on again? Complete Terminal Error on any difficulty.

Research and Development Upgrade the Rarity of one common vehicle of the HOT WHEELS™ - Batman Expansion.

In the Belly of the Beast In Zetsubou No Shima, survive getting consumed.

Happy Trails Complete By the Trail of Our Dead

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.

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.

Stunning! Pigsy's Perfect 10: Stun 5 enemies using one single EMP device.

Taking Flight In Gorod Krovi, ride a Dragon.

Requiem of the Forgotten Kingdom Complete the Forgotten Kingdom Story

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

Kali Ma Complete Abaddon Asylum on any difficulty.

YOU CAN'T RUN 10 wins as a hider in Hide n Seek Mode
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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.

Still counting Attain a Time Trial star rating of 50

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.

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

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

Total protonic reversal Complete Return to Hell on any difficulty.

High Score Score 800,000 points in one game -- with Game Settings set to Hardcore.

Iron Mode Complete the game in Iron Mode.

A Can Of Worms Play Trial of the Worm for the first time.

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

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

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.

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

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

Undiscovered Truths Find all the intel hidden in Nightfall.

None more hard Complete the Campaign on Nightmare difficulty.

Just Like Old Times Dispatch the professor with a shot to the groin.

Chimp on the Barbie In Ascension, kill a space monkey with a fire trap.

Deliver This Complete the "Special Delivery" Special Ops mission on Veteran 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)

Green Series clear Get a silver medal on every green track

Hot Pants Complete I Now Know Why You Cry

Extreme Manhunt Complete a Seasonal Manhunt mission on Challenge difficulty or above.

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)

Nahantu Sightseer Explore all of Nahantu.
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Ladies Night Beat an Echo Six Expansion Pack mission with the 3 female characters in your party.

Master of the reliquary Gather all the fingers of Frankenstein

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

Oh Yeah!!! Complete Nothing is as it Seems