TheMerovingian

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)

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

The path of the warrior Acquire all of the skills and upgrades

The Bigger They Are... Destroy a total of 100 Custom Cyborgs during story mode.

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

I've Got This Acquire all upgrades

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

Jaguar's Redemption Defeat Salvador as Jaguar

Act 1 Cleaner Complete all Act 1 maps on Nightmare difficulty.

Stop breaking the game. Complete 10 secrets.

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

Tearing Away the Disguise Destroy all of the humanoid Dwarf Gekkos during story mode.

Lord of War On day 1 of the Firestarter job, steal all the weapons from the hangar.

Cloud Nine Level 25, ride a cloud.

Knowledge is Power Collect all logs through out the game.

Still counting Attain a Time Trial star rating of 50

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

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.

A Lover, Not a Fighter Successfully complete 10 No Kill battles during story mode.

Battle Hardened Beat 5 levels without dying.

New Perspective Level 29, play as a scroll.

Surprise Attack! Arrive at the objective in File R-07 without being spotted.

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

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

Act 2 Cleaner Complete all Act 2 maps on Nightmare difficulty.

Get a clear shot Manually perform a headshot with the ACU helicopter

Completely Completed Complete all the levels.

Call me Terror-Billy! Beat the game on "Call me Terror-Billy!" difficulty or higher

Play Pong! Play Pong in the game.

Tank Oppressor Destroy 20 tanks in sequence.

You know you're REALLY Insane, right? Complete the entire main campaign on Authentic Plus difficulty

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

Act 4 Cleaner Complete Act 4 on Nightmare difficulty

For Debugging Only! Find and complete the secret ending.

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

Views From the Abyss STU: Complete "The Spider's Thread" mode.

Wishing for the Best Complete the "Last Wish" Raid.

Who's Laughing Now Beat the third boss.

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

The third faction Rescue all the Buddies from their respective predicaments

Salutatorian Achieve an Overall Evaluation grade of B

Robin Revenge Obtain 78 medals on the original Arkham City and Robin Bundle Pack ranked maps (as Robin)

Nightwing Revenge Obtain 78 medals on the original Arkham City and Nightwing Bundle Pack ranked maps (as Nightwing)

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

Fly Swatter Destroy 3 Flypods within 5 seconds on any level of Insect Infestation.

Coming In Hot On day 1 of the Watchdogs job, don't let the cops shoot and destroy the escape vehicle.

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