Batman: Arkham City achievements

Jump off the tallest building in Arkham City and glide for 1 minute without touching the ground.

Rescue all the hostages from Riddler

The joke's on who?

Clean up the Dry Docks

Rescue the fifth hostage from Riddler

Find a way into the secret base

Find someone to play remote Batarang catch with

Complete one combat challenge without taking damage (any character)

No crimefighter should be without this

Rescue the fourth hostage from Riddler

Complete a combo of 50 moves (any play mode, any character)

A moment of remembrance