AgentOmegaX

Laser Eye Surgery Kill the eye cube while pulling back the arrow

Rock It! Escape the Workshop

Discoverer Discover at least one secret area.

A Big Fan of Lefties Acquire all enemy officers' left arms.

Welcome to MY World Defeat 25 Enemies in the Living World as Uay Pek

Nightmare Descent killer Finish 'Nightmare Descent' on Insane

Collector Acquire all items available in normal time attack

Z-Genocider 2: Genocide Harder Kill 53,596 zombies

Feeding Time Feed the Narwhal.

For my next trick Get killed by a sawblade

Icebreaker Equip the Icebreaker.

Bond. True Bond. Achieve the highest level bond with someone.

Lambda Angelus in 60 Seconds Defeated Lambda in the final battle in a minute or less.

Factory Zero You survived Hei Zhen Zhu and RBS using no Praxis kits, weapons, grenades or mines. Whoa.

Guac is Extra Find Dave the Burrito.

Forever Marked Progress the story to unlock.

Under The Ice Finish the main quest in The Pale Reach.

Steal the Show Perform with the Dead Band at the Mariachi Club as El Muñeco

Death of Comedy Use every type of novelty weapon on a zombie

Body Builder Defeat a Giant Skeleton as Uay Pek's Head

Catch Me If You Can Activate thrusters on a Bat vehicle

Let's Play Complete the first Horde Mode Mission

Roadblock In chapter 4, defeated Motormaster while racing him.

Game Clear: Hard Completed the game on the Hard difficulty setting.

Fresh Fish Have 5 ice blocks in your cargo.

In Shreds and Tatters Either on (at least) your 2nd playthrough or in Hard (or greater) difficulty, conquer the fierce battle at Falkewin Hillside without using any items! It's a steep challenge, but you've got what it takes!

Pursuit of Knowledge Filled 80% of the Datalog.

The Blessing Bell This is proof that you've sanctified at least one piece of equipment. A super deal that doubles the effect of the skill in the first slot! Of course, if you're particularly devout, you can also offer this item to the Lord of the Land and secure a more blessed future for our children.

Friends with Death Die 100 times

Knuckle Down Hang in the air for more than 4 seconds using the Dust Knuckles.

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

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

From The Black Depths Catch the Colossal Squid.

All Star Get 100 Stars in S.T.A.R. Lab Mode

Around and Around We Go Perform every level interaction once

Polar Angler Catch all known species of fish in The Pale Reach.

Frozen Favors Finish all side quests in The Pale Reach.

Arc of Iron Defeat 3 enemies with one Throwing Anchor.

Jaguar's Redemption Defeat Salvador as Jaguar

Through the Looking Glass Find and zoom view on the Mad Hatter cameo

Duct Tape FTW Create all combo weapons

A Growing Darkness Reach maximum Dark Balance.

Give Them Something to Believe Complete New Game Plus

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

Area of Expertise Complete any gear challenge category.

Elite Destroy 5000 Zetachron ships.

Cold Corruptions Catch all aberrations in The Pale Reach.

Fallen Son Analyze all four pieces of evidence from Batman's past failures

Rare and Exceptional Purchase Armor, a Charm, or Vanity Gear from Masujiro the Melodious in New Game+.

Epithetologist (100 titles) Acquired 100 different titles for Pascal.
Just a little more! Note: Excludes bonus costume titles.