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Interagency Task Force Play through one entire mission with two other live players.

Campaign Nightwing Obtain 114 medals on the original Arkham City and Nightwing Bundle Pack campaigns (as Nightwing)

Chapter V Complete Chapter V on any difficulty.

Birth of An Abomination Complete Root of All Evil

Gale Forces K.O. the opponent 25 times with an attack after a quick move.

Major Cannibalism Eat an entire family

Death to Tyranny Rescue a teammate from a Tyrant outside of the Tutorials.

Bullet dodger During highway chase on Disco level successfully avoid all rockets.

LEGACY Complete all recordings

It's a Trap! In Shi No Numa, kill at least one zombie with three different traps in a single round.

Headache Kill 50 enemies using a demon head in campaign mode

Short, Controlled Bursts Defeat all Xenomorphs in the Sulaco hangar bay without them crossing your barricade

Convoy Overtake 12 trucks in a row without crashing in a Survival event.

Blitzkrieg Complete the single player campaign in under 12 hours.

Never Toss a Dwarf Defeat Gimli as the Balrog in the Mines of Moria ("Rise of Sauron" Campaign).

Controlled Chaos In Revelations, override all of the Corruption Engines before round 6.

Spy vs. Spy In cooperative mode, prevent 10 attempts of picking up secret items.

Level 21 Unlock all weapons in the campaign mode.

Finger on the pulse Upgrade OSB Pulse Wave

Ancient tool, new purpose Defeated the Judge with a weapon dropped by the Keeper

Let it Snow Receive the Extreme Environment Suit (XE Suit)

Muppet Mastery Complete The Muppet pack's story

As A Scalpel Earn the "Excellent" rating in every performance category on a terror mission.

Chapter VI Complete Chapter VI on any difficulty.

Derailed Complete The Places We’re Meant to Die

Fall of Minas Tirith Complete the Minas Tirith level in the single player "Rise of Sauron" Campaign.

Instant Clone Soup Collect the clone DNA in under 10 minutes. That's it? That's all they have to do? Man, we're just giving these things away.

Upping the Ante Kill the Kraken using a Relic in Mayday in Regular or Hardcore difficulty.

Leave no Dead Man Behind Kill every zombie in the Park before leaving.

I am death incarnate! Beat the game on "I am death incarnate!" difficulty or higher

The Professional Complete your first Pro Tour race online

Creepy Card Shark Tried every Creepy Treat Card in combat

Hot Brotato Kill a terrorist with a returned grenade

Lost Poster Beat the Dark Room with Isaac

Not One Inch In Gorod Krovi, complete a Lockdown Event.

Unleash the Beast Accomplish your transformation by following the demon's way

At the lady's service Accomplish all of Edwen's personal quests

GOING UP! Save all Red Putties and get to the exit of Level 1.5 : Watchtower Of Squirt in 1:45 or less.

Guys Night Out Arrive at Final Destination with Only Male Survivors

Golden Acts Earn your GOLD SEGA License.

One Package, Two Receivers Kill 2 enemies with one grenade.

Dungeon Makeover Unlock 50% of Crucible content

Welcome to the Club Reach Sergeant (Level 10) in multiplayer Public Match.

The Razor Kill Satan with Eve

Remember the Fallen Collect all 35 Dog Tags

Drilling for Justice Assemble the cryonucleation tunneller - the cryodrill

Prime Complete the Campaign.

Top Score: Ironhide Complete Chapter II with a score of 1000000 or more.

Chapter VII Complete Chapter VII on any difficulty.

Bigger They Are Complete Longest Yard