Survive the nightmare of the Scarecrow's fear gas

Solve 5% of Riddler challenges

Escape from Intensive Treatment to the island surface

Rescue the guards and henchman from the Joker toxin in Decontamination

Complete a combo of 5 moves (any play mode)

Find 20 Treasures

Defeat 20 Enemies with Hand-to-Hand Combat

Find all Treasures and the Strange Relic

Find 60 Treasures

Finish the Game on Easy Without Changing the Difficulty

Kill 30 Enemies with the MP40

Kill 50 Enemies with the 92FS - 9mm