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Knucklehead Kill a total of thirty enemies using melee attacks.

Get Off My Cloud Get 100 High Fall take downs.

Hairdresser Kill five enemies in rapid succession with a headshot.

World's Greatest Detective Spirit of Amadeus Arkham revealed

It Took Two You did it! CO-LLA-BO-RATION!

Pain Builds Character Finish the game on hard difficulty.

Ripper Ruined Defeat Ripper Roo.

IQ Test Solve the first riddle

Photobombed! Get photobombed in a selfie

Baby, I Got Your Money Finish Operation: False Profits

Petrol Head Drive at least thirty different vehicles.

Bacon! Kill a razorback boar using a Molotov cocktail

Darkness Looms Complete the final mission of the Missing Persons Investigation

Power Cycle Participate in 5 different City Games

Footprints in the Sand Kill 150 Demons with the Stomp Supernatural Power

Knock You Out Do a stealth takedown on 30 enemies

H-E... Complete all open world gameplay in two districts of the city of New Hades

Put Up Your Dukes Kill an Arch Duke with a melee attack

Sea Legs Complete all naval contracts.

Arkham City Sirens Drop in on an old friend

Master Blaster Kill 2 multiplayer enemies with a single explosive.

Down Boy! Kill a zip-lining enemy player in multiplayer.

That's a Knife! Fully upgrade the knife

Only God Can Judge Me Buy a shirt in the Nudle vending machine

No Place Like Haum Finish Operation: Haum Sweet Haum

Geolocated Check in at every Hotspot

The Chosen Few Uncover the remains of all Jacob's disciples

Seraphim and Cherubim Play for at least 2 hours as Gat and 2 hours as Kinzie

Bug Sized Relaxation Release that tension at the root level.

Wasteland of Opportunities Complete Act 02

Monkey Around In multiplayer, escape death 3 times by using the rope ascender.

Quiet Time Find the best seat in the house

Faraway Frequencies The truth was out there all along!

Bad Boys Hijack a boat

Revoking Client Privileges Complete the final mission in the Human Traffic Investigation

Peephole Complete every Privacy Invasion

Saturday Night Special Complete the final mission in the Weapons Trade Investigation

Ain't No Stopping Do a bike race

Tough Nut Finish the story on hard difficulty level.

Basest Base Complete every Gang Hideout

Doing Gutgash a Big Favor Build two projects in Gutgash's Stronghold

Saints' Creed Stand on the tallest mast of the 'Queen Anne's Revenge'

To the Nines Restore and equip a matching vestige outfit

Shooting Star Fly for 500 meters while on fire

Thread the Past Restore 5 vestige outfit pieces

Picking Up the Pieces Finish Operation: Looking Glass

Stuck Up Rob five stores in under five minutes.

Imp-fanticide Kill 50 of your own summoned Imps

Up to the Challenge Beat the Challenge of Olympus

Stealth Cookie Complete an Online Tailing without being detected