Defeat two Titan Henchmen at once

Save Dr. Young from being killed by Victor Zsasz

Escape from android combat without taking damage

Use the vent system 20 times

Use the revolver

Encounter the Alien in Sevastopol for the first time

Collect an ID tag

Complete the first mission

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

Solve 10% of riddler challenges

Survive the nightmare of the Scarecrow's fear gas

Solve 5% of riddler challenges

Escape from Intensive Treatment to the island surface