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

The High Hat Defeat a boss on Inkwell Isle IV without killing any of its minions

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

Paladin Obtain great power

141 Ready Complete the campaign on Veteran

Lock, Stock, and Barrel Complete all Mission Stories in Golden Handshake.

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

Campaign Wonder Obtain 114 medals on the original Arkham City and Robin Bundle Pack campaigns (as Robin)

Worst Nightmare Master the Worst Nightmare Dark Knight track

Annihilation Get 100 Elite Zombie Eliminations in Zombies

Campaign Nightwing Obtain 114 medals on the original Arkham City and Nightwing Bundle Pack campaigns (as Nightwing)

Rough Rider Destroy 15 vehicles during a single challenge

Drone Joust Defeat an Agent riding an Agency drone while riding an Agency drone yourself

Clean Sweep Complete the System Rift Jensen Story without killing anyone.

Just Take the Pod Complete all New Horizon Expeditions.
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Going Up… In The Darkest Shore, unlock the Ubersprengen.

A Just Cause Decide what to do with the Altered Biocell.

Let it Snow Receive the Extreme Environment Suit (XE Suit)

Muppet Mastery Complete The Muppet pack's story

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

Ranger Obtain an A-Rank or Higher on all bosses in Inkwell Isle IV

No More Marching Killed all the mascots of the Popcorn Parade

Is This Real Life? Survived rebooting the network in the Project Resolve Center

Dipped in Gold Purchase all Safehouse and Player Upgrades in Campaign

Murder He Wrote Find all pieces of evidence behind the Saridakis murder.

Drilling for Justice Assemble the cryonucleation tunneller - the cryodrill

No Floating Shoot all buoys in the water.

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

Diligence as a goal Get 3 stamps in any arena challenge.

Such a Flirt Asked out by two girls.

Too Hot to Handle Complete the server chamber area without being detected by any HeatEye cameras or enemies.

All out Escape the Morenia

Full House Complete all Mission Stories for The Last Resort.

Knock Knock Get Slaw to open the security door within the Palisade Blade.

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

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

Biggest Fan Finish developer commentary mode

Cyberized Research all Augments for 10 Items in Zombies

Squad Chief Helvig Defeated S&R Squad Chief Helvig

A Criminal Past Complete A Criminal Past.

Don't Reach, Kid Find the basketball and put it in the hoop.

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

Crusade - Chapter XIII Finish the levels from Chapter XIII in Knight difficulty

Forklift Tagging Shoot and hit the forklift driving around in the far section of the harbor.

For Auld Lang Syne Stop Freeze and bring Boyle to justice

Stalact-tactician Takedown 2 enemies with one stalactite

Legend of the Dark Knight Complete all Dark Knight challenges

Take your own advice Save Aksali Noll

Award-Core Assassinate target with the award and exit the mission via the main entrance, data core in hand.

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