Defeat two Titan Henchmen at once

Capture and lock up Harley Quinn

Face your biggest fears and keep your sanity

Gain access to Administration after it is locked down by the Joker

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

Survive the nightmare of the Scarecrow's fear gas

Solve 25% of riddler challenges

You feel a cold as you examine the sword and skeleton. A rustle of wind in the trees faintly echoes the name Arthas

Beat the game on Hard Difficulty

Killed 150 enemies while in Berserker mode

Killed 50 enemies while in Berserker mode

You found a mysterious hatch!

Defeated Weapon 11 (Deadpool)