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

Solve 55% of Riddler challenges

Defeat the giant Titan Ivy plant

Complete one combat challenge without taking damage

Complete one predator challenge by using only Silent Takedowns and without being detected

Conquer the effects of the Scarecrow's fear gas

Solve 40% of Riddler challenges

Capture and lock up Harley Quinn

Save Dr. Young from being killed by Victor Zsasz

Complete a combo of 10 moves (any play mode)

Read a letter left behind by Jill.

Kill 3 enemies at once with a sub-weapon.