Kiwootsu

Heavy Metal In Die Maschine, forge the Pack-A-Punch machine.

Free fall Splashhhhh!

The Professional Completed the street chase in Comrades in under 2 minutes 30 seconds without dying

Dial B For Bomb You unlocked the special ability of Packie's car bomb placement.

Tiny hoard Get a total of 10,000 Coins.

Ding! You took a little elevator ride.

Kaleidoscope Kill 3 enemies using sniper scope while wearing the Gas mask and using the Night Vision goggles all at the same time.

Electric Burn Kill the Electric Great White

Mother knows best Complete all Mother Hen secondary missions in the main game

Combat Specialist Cold Darkness Challenge: Complete Cold Darkness without dying

Another Brother Falls You survived the drive into Sinclair Parish

Nothing But Net Score a basket by lobbing a grenade through a basketball hoop

Shadow Killer Kill the Shadow Orca

Boom Stick Use the upgraded Rossmore secondary fire to set 6 enemies on fire at once

Fireworks Use the Wildfire secondary fire to kill 6 enemies in one shot

Apprentice Complete Game - Apprentice difficulty. Do not change the difficulty after the game has started.

Eyes Of The Storm Obtain A Thousand Eyes skill, equip elite versions of Oathtaker's Bow and Sinchi Chiqa Battle Dress

Not Part of the Job Description The water's rising, but we'll get out of this without a scratch. (Ch. 5)

Cleaned The Mean Streets You caught 20 criminals through the police computer.

Unstoppable Reach Wave 15 in each mission of Special Ops Survival mode.

Twice Nightly Complete New Game Plus

Mediocrity Complete Campaign Mode On 'Normal'

The Root Of Corruption Open The Well Of Souls

Ultimate Trump Card Obtained all Master Arts for Joker.

The Last Laugh The joke's on who?

Like a Surgeon Singleplayer: While long range sniping, hit one of every bodypart

Gem-studded Slot an elfstone into an item.

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

EXTRA: Santa Ladonna Survive 20 minutes in Laborratory.

Peek-a-boo! Kick open a door, peek open a door, and throw a grenade while peeking a door.

Strategist Performed a multitude of paradigm shifts.

Diamond Geezertron Unlock the final skill in either skill tree

Put Herself Together Complete the Mother Protector Challenge Tomb

Retreat From Fire Cause the Alien to retreat using a molotov

Kill Your Darlings You put your imagination in its place.

Perfect Aim Win a match as Deathstroke without missing a shot (minimum 12 shots)

Creature Comforts Obtain White Breath skill, equip Grip of Fear White Knuckle and Scales of Q Feathered Serpent

Veteran Status Qualify from 500 rounds

Bone Breaker Kill the Bone Sperm Whale

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

Roops! Knock a Hybrid off the cliffs in Mt. Pleasant, PA

Head Games Rescue Mad Hatter's second hostage.

Gladiator Completed a Coliseum Attack stage

Career Criminal Attain 100% Game Completion.

No Teleporting Allowed As a Plant, Destroy a Teleporter in Gardens & Graveyards

The Big Boss Defeat Absalom

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

Chronosavior Obtained the highest possible result in the battle to determine the fate of the world.

Bag lady Find all three hidden bags in one chapter

By a Whisker Won a race with a lead of 0.5 seconds or less.