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