Kill a guard ringing a bell.

Complete memory sequence 1.

Use quick heal to heal yourself 20 times.

Survive your first spacewalk.

Complete story mode on Normal difficulty

KO all the henchmen celebrating your arrival at the party

Complete a combo of 20 moves (any play mode)

Venture into Killer Croc's lair and come out alive

Defeat two Titan Henchmen at once

Save Dr. Young from being killed by Victor Zsasz

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

Complete a combo of 10 moves (any play mode)