Scrat-82

Cover Hopper Perform 10 cover to cover transition in a row

Revenge is a bitch Complete Confrontation

And now what? Complete the Campaign

Campaign Gold Obtain all 108 medals on the original Arkham City campaigns (as Batman)

The Flawed Couple Defeat General Horse.

Perfect Knight - Day 2 Complete every challenge in Arkham City - Main Story, Side Missions, Upgrades, Collectables, New Game Plus and Riddler's Revenge (as Batman)

Let ‘er Rip 100 targets killed using either an MMG or an MGL

...Where Credit is Due Watch the credits from beginning to end.
"Hey...aren't they the guys who made Dead Head Fred?"

Art is not a crime Create your own Custom Mask

Aggro-er You took the Aggro for 100 Flank kills

Environmentalist Kill 3 targets or more using an explosive object in any level

Blind Luck Kill 25 enemies using blind fire.
"Sorry. Didn't see you standing there."

Up, over, under, onwards String together the following: jump, coil (over obstacle), slide (under obstacle)

The Taming of the Moo Defeat General Bull.

Sweet goodbye Triggered the flip-off move

Demolition Derby Destroy 50 cars

Platinum Congratulations!

Dog on a Short Tin Leash Defeat General Dog.

Overcoming the Nemesis Defeat Nemesis

Complete Blackout Campaign: destroy 22 satellite uplinks

Soul Searcherer Rescue a ton of captive souls.

Sphere Master Complete a Sphere Grid for one character

Combo Master Perform a x10 Co-op Combo

Queen Anne’s Revenge Playing as Blackbeard, perform an acrobatic kill and a gun kill in less than 10 seconds.

Russian Attack Kill 50 enemies with the AK-47.
"They might be socialists, but they make a pretty good gun."

Eat FIST! Perform 10 single-hit melee kills.
"In Hazard Land, the hand can be used like a knife."

Tech Curator Collect all Tech Orbs.

Better Than One Score two headshots with one bullet.
"Eat lead...both of you!"

Light collector Gather all the 30 Light gems

Platinum Trophy Collect all ENSLAVED™ trophies.

Supply... Unlock new weapons by hitting a Convoy

Deja-Vu Defeat Sting Sniperscope again in Level 3.
"Your present ends now. Again."

TWO heads Complete a mission (excluding New Blood) with a human partner

Green collector Gather all the 30 Life gems

Peekaboo...I Shot You! Kill 50 enemies with the Sniper Rifle.
"Zoom, pow! Right to the moon."

Blood Sport Perform 100 melee kills

Fiddler on the Woof Defeat General Robo-Dog.

Elevator to the Gallows Kill a player using a lift that has been trapped with Booby Trap.

Master improver Find all the secret Brotherhood arks

Disco Inferno Kill all enemies without leaving the dance floor in the city outskirts

No Pain, No Gain Kill an enemy with an explosive that also damages you.
"That's gonna hurt me more than it hurts you. Well...maybe not quite as much."

Dark collector Gather all the 30 Shadow gems

Bye Bye Bunnie Defeat General Rabbit.

Five Finger Discount Finish the Supermarket level in "Joe's Adventures."

Sharpshooter Kill 100 enemies by headshots in "Jimmy's Vendetta".

...into the fire. Save a Buddy from a mortal wound

La Cage aux Fowls Defeat General Rooster.

Auto Dealer Kill 50 enemies with the sub-machinegun.
"You would think this one would have been automatic. Get it? Automatic? Nothing?"

Infiltrator Infiltrate 10 Military Bases disguised as a Commander.

Master jeweler Gather all hidden magic gems