Destroy every single building and helicopter and win the final battle in Monster Escape (playing as the VR Monster).

Finish 'Final Inferno'

Have picked up all weapons

Complete Level 5

Piece together Riddler Trophy, Cube and Cane in Riddler case file

Discover doll sized characters

Score 30 or more on the Batarang trial

Place the two lungs, eyeball and cranium in to their correct locations in the anatomical model

Unlock access to the Batcave

Finish 'Ghost Town'

Get > 80% accuracy on a level

Kill 20 enemies with barrels

Finish 'Psycho Cellblock'