Here is the full list of all 35 Call of Duty: Black Ops II achievements. It takes around 30-35 hours to unlock all of the achievements on Windows.
Complete all challenges in Black Ops II.
Only one can survive.
A duel between rivals.
Jailor or executioner.
Reinforcements on the way.
Crack the celerium worm.
Minimum score of 10k in every mission.
Successfully assassinate SDC Chairman Tian Zhao.
Successfully rescue HVI.
Successfully escort the VIPs to safety.
Successfully defend FOB Spectre from incursion.
Successfully neutralize the SDC freighter at Keppel Terminal.
Complete all challenges in a level.
Use a future weapon in the past.
Collect all intel.
Stop Menendez once and for all.
Complete all future levels in veteran.
Complete the campaign on Hardened or Veteran difficulty.
Escort the president to the secure location in downtown LA.
Interrogate Menendez.
Capture Menendez.
Capture Manuel Noriega and bring him to justice.
Complete "Pyrrhic Victory", "Old Wounds", "Time And Fate", and "Suffer With Me" in Veteran.
There are two futures.
Listen and think before you shoot.
Find the Karma weapon.
Gather information on Raul Menendez' suspected terrorist plot.
Plastic surgery avoided.
Take down Menendez and his operation.
Stop the brutality inflicted by the PDF.
Gather intel on Raul Menendez from Mullah Rahmaan.
Investigate the jungle facility.
Complete 1 challenge in any level.
Complete a level with customized loadout.
Rescue Woods.