Defeat 50 enemies with the Dragon Sniper

Defeat 100 enemies with headshots

Defeat 30 enemies with Mk-NDI grenades

Defeat 50 enemies with hand-to-hand combat

Defeat five enemies in a row with headshots

Defeat 20 enemies with hand-to-hand combat

Complete story mode on Normal difficulty

KO all the henchmen celebrating your arrival at the party

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

Venture into Killer Croc's lair and come out alive

Defeat two Titan Henchmen at once

Capture and lock up Harley Quinn