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Zombie Slaughter Kill 500 zombies

It's All About the Points Score at least 40,000 points in Survivors.

Breaking and Entering Find a way into the secret base

Sightseer You have taken all variations of the helicopter tours of Liberty City.

The Nanny Kill 30 Crawlers without detonating them

That's How We Roll! You unlocked the special ability of Brucie's helicopter ride.

The Gully Completed the larger challenge in The Gully coliseum

Morituri te salutant Survive 30 consecutive waves with at least one co-op player.

Gobble Gobble You got a turkey in 10-pin bowling.

Bobble-trap Collected 15 Claptrap bobbleheads

Stealing the Show Win the prize for outstanding performance in the Junon parade.

The Lubricator Found 25 oil cans

What a party! Collected 3 panties, 5 fish in a bag, and 15 pizzas

Keep the Good Times Rolling Chain a 20-defeated combo in Slayers.

Epic Dismemberment Dismember 2,500 Necromorph Limbs (single player only)

Master's Seal Fully developed all characters.

Bountiful Survive 3 days holding a bounty of $250 in all states.

How's It Hanging? Clean up the Dry Docks

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

Stick it to the enemy Survive 15 consecutive waves using the analog combat controls.

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

Complete a set During a single round kill an Infected, Suicider, Ram, Butcher, Floater, Walker.

Completionist Completed all missions in Secret Armory

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

Hell-Burbia Completed the larger challenge in the Hell-Burbia coliseum

No Tumbler Fumbler Picked 25 locks.

The Last Laugh The joke's on who?

Chain Reaction You exploded 10 vehicles in 10 seconds.

Your blood pressure is zero over zero Headshot a Heavy Armour Zombie without removing his helmet

Career Criminal Attain 100% Game Completion.

Twice Nightly Complete New Game Plus

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

Rolled Over You managed 5 car rolls in a row from one crash.

Elevator Action Knock off every Tripod during the Elevator Sequence

The Angelic Ruins Completed the larger challenge in The Angelic Ruins coliseum

Solid Gold, Baby! Earn any 70 Gold Medals on Missions, Strangers and Freaks.

The Fat and the Furious Complete a Continuous Speed Run as Doughnut Drake

Exorcist Triumphed over undying lowerworld souls in seven fierce battles.

Need for Speed Achieve a Complete Speed Run Time of Less than 2 Hours and 30 minutes

Galuf's Grail Completed all Cie'th Stone missions.

Manhunt You completed the most wanted side mission.

Big Tournament Completed each of the larger challenges in all 3 coliseums

Outstanding Orator Made 50 Speech challenges.

Paint Splurge Fire 5,000 paintballs

Run the Gauntlet Complete "Desperate Escape" on Professional.

The S Stands for Stylish!! Acquire all of the costumes in the game.

It Takes Two to Tango Chain a 40-defeated combo in Team Slayers.

Finish Him You completed 10 melee counters in 4 minutes.

T-Bone: Friends in Need Complete Act 1

Adamant Will Felled a heavyweight of the lowerworld wilds.