Big Bang

Complete story mode on Easy difficulty

Crocodile Tears

Venture into Killer Croc's lair and come out alive

Freakshow Rodeo

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

Mental Athlete

Solve 70% of Riddler challenges

Resist The Fear

Conquer the effects of the Scarecrow's fear gas

Poisoned Ivy

Defeat the giant Titan Ivy plant

Bigger Bang

Complete story mode on Normal difficulty

Conundrum Cracker

Solve 55% of Riddler challenges

Double Trouble

Defeat two Titan Henchmen at once

Rope-A-Dope-A-Dope

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

Shocking Rescue

Take down Zsasz in the Patient Pacification Chamber

Zsasz Cut Down To Size

Save Dr. Young from being killed by Victor Zsasz

Recurring Nightmare

Face your biggest fears and keep your sanity

Daydreamer

Survive the nightmare of the Scarecrow's fear gas

Lateral Thinker

Solve 25% of Riddler challenges

Breaking And Entering

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

Freeflow Combo 20

Complete a combo of 20 moves (any play mode)

Arkham Analyst

Solve 5% of Riddler challenges

Just What The Doctors Ordered

Save all the doctors in Medical

Cryptic Investigator

Solve 10% of Riddler challenges

Malpractice Needs More Practice

Survive the onslaught from the deformed Joker henchman

Solitary Confinement

Capture and lock up Harley Quinn

Freeflow Combo 10

Complete a combo of 10 moves (any play mode)

Freeflow Combo 5

Complete a combo of 5 moves (any play mode)

Born Free

Escape from Intensive Treatment to the island surface

Mystery Solver

Solve 40% of Riddler challenges

Leave No Man Behind

Rescue the guards and henchman from the Joker toxin in Decontamination

Baneful Payback

Defeat Bane

Riddle Resolver

Solve 85% of Riddler challenges

Crack The E Nigma

Solve every riddle on the island

Mano-A-Mano

Defeat Titan henchman without using Batarangs (any play mode)