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Steele-Trap Killed Commandant Steele-trap

Ned-Trap Killed Dr. Ned-trap

Beat Rocking Blocks Land the third punch of a Titanic Counter twice in a single battle (excluding those in the Hall of Virtue).

Biker Boy Get praised by Jessie at the end of the motorcycle mini-game.

Droning by numbers Get hit 5 times by a drone during a playthrough, on any given difficulty

Easy Come, Easy Go Acquire more than 15,000 Fleeting Echoes on a single attempt

Welcome to the Club Reach Sergeant (Level 10) in Multiplayer while playing online.

Muerte la robo-lución Killed the Interplanetary Ninja Assassin Claptrap

What's In The Box?! Escape the Keeper beneath the catacombs.

Lending Library Found all Pulp Magazines

Time Out Win a match by time out

Griefer Madness Acquired the Griefer

Mushroom Slider Earned a silver medal or better in the Rift Plane Sliding Race.

Go For the Eyes Defeat a total of 20 Visitors with headshots.
14/20

The Whole Story Completed the Collection

Peeress of Pull-Ups Complete all pull-up challenges.

Light my fire Set 10 zombies on fire simultaneously.

In a Land Far Away Completed Chapter 2 of Episode 4

Dramatic Timing Completed Chapter 1 of Episode 4

It Came From Outer Space Completed Chapter 3 of Episode 4

Hero Tech Battle with a secret weapon.

Disc Jockey Collect all music discs.

May you be unharmed Vanquish Maiden Astraea without killing Garl Vinland

From the Jaws of Defeat Completed Chapter 5 of Episode 4

Half Past Twilight Craft the legendary sword Gotterdammerung.

The End of the Line Completed Chapter 4 of Episode 4

Fists of Legend Vanquish Dragon God with the Hands of God

A New World Order Completed Chapter 6 of Episode 4

Family Reached the Loyal state with all three Underbosses

Mystery Fox Domination Found all Mystery Foxes

Let Sleeping Rockstars Lie You killed a Rockstar in multiplayer.

Drop It Like It's Hot Kill 3 living enemies with one drop of a match.

You're Not the Boss of Me Defeat a boss without taking damage.

Gotham Base Jumper Jump off the tallest building in Arkham City and glide for 1 minute without touching the ground.

Understood the Assignment Complete 9 Mastery Quests

Building Character Attain level 50 with a character.

Man or Monster? Complete ''Arkham Barely Believe It''

Fight at the Forum Participate in a fight at The Forum arena

To Boldly Go… Completed Chapter 6 of Episode 5

Friends in High Places Completed Chapter 3 of Episode 5

Finders Keepers Completed Chapter 1 of Episode 5

Out of the Blue Completed Chapter 5 of Episode 5

Losers Weepers Completed Chapter 2 of Episode 5

Castles in the Sky Completed Chapter 4 of Episode 5

Auld Lang Syne Completed the Main Campaign on 1999 Mode.

Multiplier 10x Score a 10x multiplier in a Story level

Second-String Pitcher Earned a silver medal or better in the Pleajeune Pitching Challenge.

One Hundred And Eighty You scored 180 with 3 darts.

Defensive Fighter - Kill 30 Helghast with an emplaced weapon Kill 30 Helghast using the StA3 fixed gun emplacement

Scavenger Hunt Completed the Main Campaign in 1999 Mode without purchasing anything from a Dollar Bill machine.