Venture into Killer Croc's lair and come out alive

Conquer the effects of the Scarecrow's fear gas

Solve 40% of riddler challenges

Save Dr. Young from being killed by Victor Zsasz

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

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

Survive the nightmare of the Scarecrow's fear gas

Complete a combo of 10 moves (any play mode)

Solve 5% of riddler challenges

Survive the onslaught from the deformed Joker henchman

Take down Zsasz in the Patient Pacification Chamber

I. Hear. A. Sound.

Upgrade every weapon to level 4.