Use 5 different Quickfire gadgets in one fight as Robin in Harley Quinn's Revenge

Drop in on an old friend

Shield Bash 5 different thugs

Defuse all bombs in 3 minutes or less

Find a way into the secret base

Obtain 24 medals on the original Arkham City ranked maps (as Batman)

Obtain 36 medals on the original Arkham City campaigns (as Batman)

Obtain all 108 medals on the original Arkham City campaigns (as Batman)

Obtain all 108 medals on the original Arkham City campaigns (as Catwoman)

Obtain 114 medals on the original Arkham City and Nightwing Bundle Pack campaigns (as Nightwing)

Obtain 72 medals on the original Arkham City campaigns (as Batman)

Obtain 114 medals on the original Arkham City and Robin Bundle Pack campaigns (as Robin)

Find someone to play remote Batarang catch with

Obtain all 72 medals on the original Arkham City ranked maps (as Catwoman)

Complete one combat challenge without taking damage (any character)

Zip Kick 5 different thugs

Obtain all 72 medals on the original Arkham City ranked maps (as Batman)

Clean up the Dry Docks

No crimefighter should be without this

Obtain 78 medals on the original Arkham City and Nightwing Bundle Pack ranked maps (as Nightwing)

Destroy all Harley Balloons

A moment of remembrance

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

Complete every challenge in Arkham City

Obtain 78 medals on the original Arkham City and Robin Bundle Pack ranked maps (as Robin)

Obtain 48 medals on the original Arkham City ranked maps (as Batman)

Snap Flash an unarmed thug, an armed thug, an environmental object and a Titan

Complete all 40 of the Catwoman Riddler grid items

Have 12 murderous dates with Calendar Man

The joke's on who?

Complete New Game Plus