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Solitary Confinement Capture and lock up Harley Quinn

Event Horizon Defeat 100 Enemies with a Neon Singularity

Lateral Thinker Solve 25% of Riddler challenges

Double Trouble Defeat two Titan Henchmen at once

Resist The Fear Conquer the effects of the Scarecrow's fear gas

Crocodile Tears Venture into Killer Croc's lair and come out alive

Freakshow Rodeo Ride Titan henchman and knock down 10 thugs (any play mode)

Poisoned Ivy Defeat the giant Titan Ivy plant

Fish in a Barrel Kill 50 enemies by using water.

Big Bang Complete story mode on Easy difficulty

Taking Out The Trash Defeat Alden.

A-ha! Obtain something by closely examining an item.

Drop Everything Thunder Drop for a total distance of at least 500 meters.

Junior Geologist Find 25% of the Shards.

Evil Eats Bad guys never share their food.

Frequent Flyer Travel 5 kilometers using Static Thrusters.

Mystery Solver Solve 40% of Riddler challenges

Behind Closed Doors Close an open door by yourself.

The Gardens Complete all levels in The Gardens

Welcome to the Family, Son Escape from the guest house.

Evil Riot Bad guys love starting riots.

Good Sphere Good guys put a stop to the madness.

Lost And Found Uncover the secret of Arkham City

…Bada Boom! Defeat 20 Enemies in a row with Homing Missiles

Sandstorm We are legion

Party Pooper KO all the henchmen celebrating your arrival at the party

Good Finish Beat the game as a Hero.

Good Intentions Good guys work for the greater good.

Hide And Seek A deadly game of hide and seek

Bigger Bang Complete story mode on Normal difficulty

Professional Complete 50% of all Challenges

AC/DC Drain 750 megawatts of power from Empire City.

Rope-A-Dope-A-Dope String up one henchman and drop him to surprise a second (any play mode)

Master of Unlocking Use a lock pick to open something.

Arms in the Air Block an enemy attack by guarding.

Ghost Train Fight for survival

He's Here, There, Everywhere! Destroy a Mr. Everywhere statuette.

Freefall Don't look down

Just Scratched the Surface Collect all Dead Drops in the Neon District.

Civic Leader Take over all territory in the Warren.

Conundrum Cracker Solve 55% of Riddler challenges

Exit Stage Right All the world is a stage

Night Glider Glide continuously for over 100m

Urban Designer Take over all territory in the Historic District.

Great Responsibility 50 Hostage Saves

Beta Survival Diamond Achieve a score of 500,000 points

The Savannah Complete all levels in The Savannah

Alpha Survival Diamond Achieve a score of 500,000 points

Self-Improved Activated 20 ability nodes.

Alpha Rescue Diamond Achieve a score of 500,000 points