Denomyzer

Northern Lights Fill the night sky with Aurora Borealis

One Way To Do It Endurance Challenge: Warm up from freezing by standing in fire

March Through the Marsh Complete Mosslight Marsh

Smash the State Help Officer Nicholas take out the trash.

Creature Feature Obtain Creature.

Master Bowman's Trophy Obtained Best Bow by Spiderstone

Extra! Extra! Collect all the red bricks (Single Player Only)

40 and Flirty Reach level 40

The Nursery Get into the Nursery

Who's The Boss? Defeat the Skrendel Brothers.

RIP Davey Glutes Obtain the Mag-Boots.

Spinning Leaf Cold Darkness Challenge: Get 5 headshots with the regular arrows in 1:00

Gorilla Thriller Climb to the top of Wayne tower while riding a Gorilla and playing as a female character.

Combat Specialist Cold Darkness Challenge: Complete Cold Darkness without dying

It's Not Over Defeat Samael

Lord of the Black Stone Complete Lord of the Black Stone

Fox? Or Flying Squirrel? Stay airborn for more than 8 seconds using jump-gates or geysers

Bringing the Pain Defeat 50 players using physical attacks in Versus.

SATURN Completed the Saturn levels

Hardest Battle In The Game Defeat Dr. Giblets.

Twice Nightly Complete New Game Plus

Tunnel Entrance Activate your first Metro Station.

The Root Of Corruption Open The Well Of Souls

Diamond Geezertron Unlock the final skill in either skill tree

Silver Revenge Obtain 48 medals on the original Arkham City ranked maps (as Batman)

Mediocrity Complete Campaign Mode On 'Normal'

The Last Laugh The joke's on who?

A Stroll In The Demonic Park Complete the game on any difficulty setting

The Big Boss Defeat Absalom

Ancient History Find and light all 8 types of carved Ancient Murals

Justice League Unlock all Justice League characters (Single Player Only)

Completionist Completed all missions in Secret Armory

Spreading the Word Collect over 50 Guild Cards.

Expanded Storage Get the XXL BOB

The Final Countdown You showed millionaire Hugh Darrow that his logic was flawed.

Flat-Out Complete all Speed Runs

Squad Goals Score a Goal while in a Club Match (Online Matchmaking only)

Blood Master's Trophy Obtained Best Weapon by Suckerstone

Om Nom Nom Eat 200 food items.

Apprentice Adventurer Reach level 25.

It's Raining Cats and Hotdogs Completed a round using the Mutator.

The House of Luthor Obtain more than 10,100,000,000 Studs (Single Player Only)

Legendary Gunsmith Cold Darkness Challenge: Open 6 upgrade pry chests

Spent 15 Hours At The Alien Strip Club Spend 15 hours at the very real in-game alien strip club.

Self-Actualization Defeat Nipulon.

Still In the Game Survive to Round 5

Smasher Exterminate 10 Ratoids by smashing them with Tetromino Bricks.

The Heavenly Goddess Perform a Level 3 Super with Nariko on 'Fearless'

First Among Equals Win a match of skirmish or domination.

Congratulant's Trophy Obtained Best Weapon by Faintstone