Big Bang

Complete story mode on Easy difficulty

Bigger Bang

Complete story mode on Normal difficulty

Party Pooper

KO all the henchmen celebrating your arrival at the party

Poisoned Ivy

Defeat the giant Titan Ivy plant

Mystery Solver

Solve 40% of Riddler challenges

Freeflow Combo 20

Complete a combo of 20 moves (any play mode)

Freakshow Rodeo

Ride Titan henchman and knock down 10 thugs (any play mode)

Crocodile Tears

Venture into Killer Croc's lair and come out alive

Resist The Fear

Conquer the effects of the Scarecrow's fear gas

Double Trouble

Defeat two Titan Henchmen at once

Solitary Confinement

Capture and lock up Harley Quinn

Lateral Thinker

Solve 25% of Riddler challenges

Zsasz Cut Down To Size

Save Dr. Young from being killed by Victor Zsasz

Recurring Nightmare

Face your biggest fears and keep your sanity

Rope-A-Dope-A-Dope

String up one henchman and drop him to surprise a second (any play mode)

Breaking And Entering

Gain access to Arkham Mansion after it is locked down by the Joker

Cryptic Investigator

Solve 10% of Riddler challenges

Baneful Payback

Defeat Bane

Daydreamer

Survive the nightmare of the Scarecrow's fear gas

Just What The Doctors Ordered

Save all the doctors in Medical

Arkham Analyst

Solve 5% of Riddler challenges

Freeflow Combo 10

Complete a combo of 10 moves (any play mode)

Born Free

Escape from Intensive Treatment to the island surface

Malpractice Needs More Practice

Survive the onslaught from the deformed Joker henchman

Leave No Man Behind

Rescue the guards and henchman from the Joker toxin in Decontamination

Shocking Rescue

Take down Zsasz in the Patient Pacification Chamber

Freeflow Combo 5

Complete a combo of 5 moves (any play mode)