Defeat 20 enemies with hand-to-hand combat

We are legion

Stop the unstoppable

Clear the airwaves

Drop in on an old friend

There is only one way in

Save the damsel, but is she in distress?

Spirit of Amadeus Arkham revealed

Solve 85% of riddler challenges

Complete story mode on Easy difficulty

Defeat the giant Titan Ivy plant

Defeat Titan henchman without using Batarangs (any play mode)

Venture into Killer Croc's lair and come out alive