Complete one predator challenge by using only Silent Takedowns and without being detected

Complete story mode on Easy difficulty

Solve every riddle on the island

Defeat the giant Titan Ivy plant

Complete a combo of 20 moves (any play mode)

Venture into Killer Croc's lair and come out alive

Conquer the effects of the Scarecrow's fear gas

String up one henchman and drop him to surprise a second (any play mode)

Defeat Titan henchman without using Batarangs (any play mode)

Capture and lock up Harley Quinn

Save Dr. Young from being killed by Victor Zsasz

Gain access to Arkham Mansion after it is locked down by the Joker