Full list of all 64 Batman: Arkham City achievements. It takes around 80-100 hours to unlock all of the achievements in the base game on Windows.
The base game contains 50 achievements, and there are 3 DLC packs containing 14 achievements.
Rescue all the hostages from Riddler
Retrieve your stolen goods
Complete New Game Plus
Obtain all 72 medals on the original Arkham City ranked maps (as Batman)
Track down the serial killer
Stop the contract operative
Rescue the fifth hostage from Riddler
Rescue the fourth hostage from Riddler
Obtain 48 medals on the original Arkham City ranked maps (as Batman)
Collect all of Batman's gadgets and upgrades
Obtain 24 medals on the original Arkham City ranked maps (as Batman)
Complete one combat challenge without taking damage (any character)
All the world is a stage
Don't look down
Rescue the third hostage from Riddler
A moment of remembrance
Destroy it all
Steal the score of a lifetime
Fight for survival
Use 5 different Quickfire gadgets in one fight (any play mode)
Reunite the separated couple
Reveal the mystery watcher
Time is running out
A deadly game of hide and seek
Stop the phone booth killer
We are legion
Uncover the secret of Arkham City
Rescue the second hostage from Riddler
Complete all augmented reality training exercises
Stop the unstoppable
Last man standing
Clear the airwaves
Rescue the first hostage from Riddler
Solve the first riddle
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
Stop all assaults in Arkham City
Obtain 36 medals on the original Arkham City campaigns (as Batman)
Obtain 72 medals on the original Arkham City campaigns (as Batman)
Obtain all 108 medals on the original Arkham City campaigns (as Batman)
Have 12 murderous dates with Calendar Man
Perform a perfect combo including all of Batman's combat moves (any play mode)
Complete every challenge in Arkham City - Main Story, Side Missions, Upgrades, Collectables, New Game Plus and Riddlers Revenge (as Batman)
Complete all 40 of the Catwoman Riddler grid items
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 Robin Bundle Pack ranked maps (as Robin)
Obtain 114 medals on the original Arkham City and Robin Bundle Pack campaigns (as Robin)
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)
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
Zip Kick 5 different thugs
Shield Bash 5 different thugs
Snap Flash an unarmed thug, an armed thug, an environmental object and a Titan
Use 5 different Quickfire gadgets in one fight as Robin in Harley Quinn's Revenge
Destroy all Harley Balloons