Full list of all 70 Batman: Arkham City achievements worth 1,500 gamerscore. It takes around 40-50 hours to unlock all of the achievements in the base game.
The base game contains 50 achievements worth 1,000 Gamerscore, and there are 4 DLC packs containing 20 achievements worth 500 Gamerscore.
Obtain 72 medals on the original Arkham City campaigns (as Batman)
Obtain all 72 medals on the original Arkham City ranked maps (as Batman)
Obtain 36 medals on the original Arkham City campaigns (as Batman)
Perform a perfect combo including all of Batman's combat moves (any play mode)
Complete New Game Plus
Obtain 48 medals on the original Arkham City ranked maps (as Batman)
Rescue all the hostages from Riddler
Have 12 murderous dates with Calendar Man
Obtain 24 medals on the original Arkham City ranked maps (as Batman)
Complete one combat challenge without taking damage (any character)
Rescue the fifth hostage from Riddler
Rescue the fourth hostage from Riddler
Rescue the third hostage from Riddler
Complete all augmented reality training exercises
Jump off the tallest building in Arkham City and glide for 1 minute without touching the ground.
Track down the serial killer
Collect all of Batman's gadgets and upgrades
Reunite the separated couple
A moment of remembrance
Reveal the mystery watcher
Stop all assaults in Arkham City
Destroy it all
Stop the contract operative
Collect enough evidence to locate the gun for hire
All the world is a stage
Don't look down
Fight for survival
Time is running out
Complete a combo of 50 moves (any play mode, any character)
Use 5 different Quickfire gadgets in one fight (any play mode)
A deadly game of hide and seek
Stop the phone booth killer
We are legion
Uncover the secret of Arkham City
Stop the unstoppable
Last man standing
Clear the airwaves
Rescue the second hostage from Riddler
Rescue the first hostage from Riddler
Solve the first riddle
Find someone to play remote Batarang catch with
Become the Bat
Save the damsel, but is she in distress?
Save the medical volunteers
There is only one way in
Hammer the point home
Answer the call for help
Answer a ringing phone
Obtain all 108 medals on the original Arkham City campaigns (as Batman)
Main Story, Side Missions, Upgrades, Collectables, New Game Plus and Riddlers Revenge (as Batman)
Complete all 40 of the Catwoman Riddler grid items
Retrieve your stolen goods
Steal the score of a lifetime
Drop in on an old friend
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 78 medals on the original Arkham City and Robin Bundle Pack ranked maps (as Robin)
Obtain 114 medals on the original Arkham City and Robin Bundle Pack campaigns (as Robin)
Destroy all Harley Balloons
Shield Bash 5 different thugs
Use 5 different Quickfire gadgets in one fight as Robin in Harley Quinn's Revenge
The joke's on who?
Defuse all bombs in 3 minutes or less
Zip Kick 5 different thugs
Snap Flash an unarmed thug, an armed thug, an environmental object and a Titan
Clean up the Dry Docks
Find a way into the secret base
No crimefighter should be without this