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Sentry Mode Engaged In multiplayer, defeat 150 enemies with the Heavy's Sentry Gun.

Beating the One-Eyed Worm Defeat the Leech

Communication Issues Campaign: destroy 15 satellite uplinks

Demolish Part 2 Campaign: demolish 50 houses

If Mr. J could only see me now! Complete The Squad level after achieving True Hero status

Ghost of a Chance Finish the game in Invisible Enemy mode.

Regular soldier Complete the game on Marksman difficulty

TLAD: The Lost Boy Become leader of The Lost. (The Lost and Damned)

Duke Angry, Duke Smash! Kill 15 aliens with melee attacks while on steroids

The Boss Reached 30th level.

What Does This Button Do?? Complete Arcade Ladder without blocking (allowed to continue)

An ideal to strive towards Complete Man of Steel level with all Minikits unlocked

Dose of freaky ghost! Capture a scary ghost in any Ghost House level.

Tensile Strengthener Awarded for completing your tension training, and entering super-high-tension mode.

Mission Impossible Complete the game on Zealot setting

Sonic Blaster Collected 10 Wispons.

Why so serious? Complete the Dark Knight level with all Minikits unlocked

Good to be King Win 1 complete Klassic King of the hill match

Finish Him? Perform any fighter's hidden finishing move

Hell on Wheels Complete 'Blood and Iron' on Veteran difficulty. (Solo only)

World's Greatest Detective Complete Batman 75 level with all Minikits unlocked

T-Bone: Pest Control Complete Act 3

Hammer Havoc Kill an enemy with a thrown hammer bouncing at least once before kill

Gnomad Complete GnoMAD

Dominion Wraith Flash Dominate 50 Uruks.

Up to the Challenge 1 Complete 10 challenges.

In The Web Consume 50 Web Targets.

Silence is golden Stop the music in the end sequence after the saloon blew up (playing as the VR Sheriff).

Hippy-Stomper Foot stomp 12 aliens

Eddie Is Back Complete Eddie's Challenge

...The Harder They Fall Destroy every Surveillance Airship

If you don't move, it won't see you. Make the huge outdoor monster look down at you in Mini Bots (playing as the VR player).

Bat-Dancer Complete Batman's special Anniversary Dance Puzzle as Batman (1966)

Location Scout Visit all Locations in Director Mode.

Among the Stars Completed "Among the Stars"

Last Action Hero Help Garland King finally finish her picture

Halfpenny Millionaire Awarded for collecting a total of 500,000 gold coins.

Arkham City Lockdown Defeat every Villain With Batman

Bishop Reach 100k points in 1 run

Campaign Silver Obtain 72 medals on the original Arkham City campaigns (as Batman)

Just Getting Started Get 100 kills in Quick Match/Ranked Multiplayer.
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Boot Camp Complete the Tutorial

Extra strong Upgrade the Health Potions

We Will Survive Win 15 matches in Team Survivors.

Against all odds Defeat any Boss without taking damage

Parasite-Seeing In Shadows of Evil, kill 5 Parasites while riding on the train.

And STAY Down Perform 50 follow-ups in the main campaign.

EXTRA: Chaos Malachite Find the Chaos Malachite at minute 18:00 in Bat Country.

All the Gears Earn 5 Gears in every Challenge.

Let it Slide Bank more than 2000 points in a single drift.