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)

Completed Episode 5: "No Going Back"

Reached the terminus.

Reached the other side.

Took a breather.

Completed Episode 4: "Amid the Ruins"

Survived the attack.

Found the Observation Deck.