Cold Case
Interrogate the Militia Lieutenant.
Evolution
Lockup Killer Croc in GCPD.
Breaking the Skin
Gain access to the high security area.
The Beast Beneath
Defeat the prisoners.
Ashes to Ashes
End the League of Assassins' war.
Daughter Of The Demon!
Discover the Lazarus pit.
The Demon Lives Again!
Follow the assassin's trail.
In Storybook Endings
Lock up Mad Hatter in GCPD.
Head Games
Rescue Mad Hatter's second hostage.
The Scene of the Crime
Rescue Mad Hatter's first hostage.
Perfect Knight - Day 2
Complete every challenge in Arkham City - Main Story, Side Missions, Upgrades, Collectables, New Game Plus and Riddlers Revenge (as Batman)
A Few New Tricks
Use 5 different Quickfire gadgets in one fight as Robin in Harley Quinn's Revenge
Gadget Attack
Use 5 different Quickfire gadgets in one fight (any play mode)
Sphinx' Riddle
Complete all 40 of the Catwoman Riddler grid items
Pay Your Respects
A moment of remembrance
Genius
Rescue all the hostages from Riddler
Aggravated Assault
Stop all assaults in Arkham City
Frequent Flyer
Zip Kick 5 different thugs
Twice Nightly
Complete New Game Plus
Snap To It
Snap Flash an unarmed thug, an armed thug, an environmental object and a Titan