Stop the unstoppable

Clear the airwaves

Rescue the first hostage from Riddler

Drop in on an old friend

There is only one way in

Complete all augmented reality training exercises

Save the medical volunteers

Become the Bat

Venture into Killer Croc's lair and come out alive

Solve 40% of Riddler challenges

Capture and lock up Harley Quinn

Save Dr. Young from being killed by Victor Zsasz

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