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