Take down 100 enemies while they are airborne.

Find one treasure

Complete 10 of the stunts on the stunt list.

Drain 750 megawatts of power from Empire City.

Defeat 20 enemies with hand-to-hand combat

Face your biggest fears and keep your sanity

Defeat 20 enemies with gunfire by aiming while hanging

Defeat 30 enemies with Mk-NDI grenades

Rescue the guards and henchman from the Joker toxin in Decontamination

Complete a combo of 10 moves (any play mode)

Escape from Intensive Treatment to the island surface

Ride Titan henchman and knock down 10 thugs (any play mode)