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Out in the Cold Track down the cryopod.

Dropping Acid Dissolve 50 enemies with acid.

Happy Camper Endurance Challenge: Survive for 5 days

The Resurrection and the Life Survive the Militia onslaught.

Come Here, Little Boy Taunt and defeat five plus angered enemies while taking no damage. Gaze of Despair may be equipped.

A Dinner for Two Endurance Co-op Challenge: Eat the meat of 3 wolves with your partner

Who Needs a Map? Endurance Challenge: Locate 5 crypts

The Never Ending Combo Achieve a 200 Hit Combo

The Whole Story Collected all Audio Diaries and Voxophones in Burial at Sea - Episode 2.

Big Tournament Completed each of the larger challenges in all 3 coliseums

There's Always Peng! Find Peng.

What Are They Worth? Acquire all of the bottle caps in the game.

Amethyst Medal Defeated the Giant Orb using Dark Knack

Blade Runner - 75 kills with the knife Kill 75 Helghast using the knife

Perfect Action Completed a stage without taking any damage on Hard difficulty or above

Run the Gauntlet Complete "Desperate Escape" on Professional.

It Takes Two to Tango Chain a 40-defeated combo in Team Slayers.

CQC FTW Finish the game using only your knife (no lighter, Defensive Items, and stomping zombie heads).

Sphinx' Riddle Complete all 40 of the Catwoman Riddler grid items

Don't Stop Running Finish the game in three hours.

Poncho'd Out Complete the Combo Chicken quest (Defeat Poncho forever)

Sunstone Medal Defeated Katrina's Mech using Sunstone Knack

Rough Justice Stop Penguin's escape from GCPD.

Babysitter - Revive 25 Buddies Revive your buddies a total of 25 times

Still Tastes Good Endurance Challenge: Eat the meat of 5 wolves that were killed with poison damage

“Worlds of Hurt” – Tough Guy Rescued the Little Sister in “Worlds of Hurt” using only plasmids, tonics, the wrench, and the research camera, on Medium or higher difficulty

Nature Retreat Endurance Challenge: Survive for 7 days

Finish Him You completed 10 melee counters in 4 minutes.

Army of One Win 15 matches in Slayers.

Tower Apprentice Complete 25 Tower missions

Emerald Medal Defeated Gundahar's Robot using Massive Knack

Ink is for Squids Finish the game without saving.

Space Ace Shoot at least 70 targets during the ride to Tau Volantis.

Fight To The Last - Kill 1500 Helghast Killed 1500 Helghast

Electric Lawnmower Kill 30 enemies using an electrified Ripper blade.

Touch And It Will Hurt Counter 10 enemy attacks with the Moon of Mahaa-Kalaa equipped.

Nom Nom Nom! Eat a captain with a Wretched Graug.

Brutality Bonus Destroy a Romanov's arm and leg before finishing it.

Oh, the Horror Finish the game on Hard difficulty.

Hole-in-One Destroy a Chicane with a hand grenade.

Friendly Skies Defeated all waves in The OPS Zeal.

Succession Plans Break into Hell's Gate HQ and apprehend Two-Face.

Campaign Bronze Obtain 36 medals on the original Arkham City campaigns (as Batman)

Vacuum Cleaner Decompress 20 Necromorphs without getting sucked out yourself

Completist - Destroy everything on the MAWLR Destroyed every destructible weapon on the MAWLR while on foot and on the Intruder

Battering Ram Shield Bash 5 different thugs

King of Battle Achieved five-star ranks in all Coliseum Attack stages

Cock of the Walk Defeat an enemy using the Pollo Bomb

Great Outdoors Endurance Challenge: Survive for 10 days

Liberty City (5) Your friends all like you above 90%.