Full list of all 64 Batman: Arkham City (GFWL) achievements worth 1,350 gamerscore.
The base game contains 50 achievements worth 1,000 Gamerscore, and there are 3 DLC packs containing 14 achievements worth 350 Gamerscore.
Have 12 murderous dates with Calendar Man
Obtain all 108 medals on the original Arkham City campaigns (as Batman)
Complete every challenge in Arkham City
Obtain 72 medals on the original Arkham City campaigns (as Batman)
Obtain 36 medals on the original Arkham City campaigns (as Batman)
Obtain all 72 medals on the original Arkham City ranked maps (as Batman)
Obtain 48 medals on the original Arkham City ranked maps (as Batman)
Obtain 24 medals on the original Arkham City ranked maps (as Batman)
Perform a perfect combo including all of Batman's combat moves (any play mode)
Complete one combat challenge without taking damage (any character)
Use 5 different Quickfire gadgets in one fight (any play mode)
A moment of remembrance
Complete New Game Plus
Complete all 40 of the Catwoman Riddler grid items
Rescue all the hostages from Riddler
Rescue the fifth hostage from Riddler
Stop all assaults in Arkham City
Rescue the fourth hostage from Riddler
Collect all of Batman's gadgets and upgrades
Rescue the third hostage from Riddler
Stop the phone booth killer
Reveal the mystery watcher
Track down the serial killer
Rescue the second hostage from Riddler
Stop the contract operative
Complete all augmented reality training exercises
Rescue the first hostage from Riddler
Solve the first riddle
Destroy it all
Time is running out
Reunite the separated couple
Retrieve your stolen goods
All the world is a stage
Don't look down
Steal the score of a lifetime
Fight for survival
A deadly game of hide and seek
We are legion
Uncover the secret of Arkham City
Stop the unstoppable
Last man standing
Clear the airwaves
Drop in on an old friend
Hammer the point home
There is only one way in
Save the medical volunteers
Save the damsel, but is she in distress?
Become the Bat
Obtain all 72 medals on the original Arkham City ranked maps (as Catwoman)
Obtain all 108 medals on the original Arkham City campaigns (as Catwoman)
Obtain 78 medals on the original Arkham City and Nightwing Bundle Pack ranked maps (as Nightwing)
Obtain 114 medals on the original Arkham City and Nightwing Bundle Pack campaigns (as Nightwing)
Obtain 114 medals on the original Arkham City and Robin Bundle Pack campaigns (as Robin)
Obtain 78 medals on the original Arkham City and Robin Bundle Pack ranked maps (as Robin)
Snap Flash an unarmed thug, an armed thug, an environmental object and a Titan
Destroy all Harley Balloons
Use 5 different Quickfire gadgets in one fight as Robin in Harley Quinn's Revenge
Shield Bash 5 different thugs
Zip Kick 5 different thugs
The joke's on who?
Defuse all bombs in 3 minutes or less
Clean up the Dry Docks
Find a way into the secret base
No crimefighter should be without this