Perform a perfect combo including all of Batman's combat moves (any play mode)

Achieve 16 medals on predator challenges

Achieve 8 medals on combat challenges

Catch a Batarang (any play mode)

Complete one predator challenge by using only Silent Takedowns

Complete story mode on Easy difficulty

Spirit of Amadeus Arkham revealed

Defeat the giant Titan Ivy plant

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

Venture into Killer Croc's lair and come out alive

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

Defeat Titan henchman without using Batarangs (any play mode)

Solve 55% of riddler challenges