Complete story mode on Easy difficulty

KO all the henchmen celebrating your arrival at the party

Defeat the giant Titan Ivy plant

Complete a combo of 20 moves (any play mode)

Conquer the effects of the Scarecrow's fear gas

Solve 25% of Riddler challenges

Completed Chapter 6.

Became a Majima Construction employee.

Completed Chapter 4.

Save Dr. Young from being killed by Victor Zsasz

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

Solve 10% of Riddler challenges