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.
Collect all intel.
Crack the celerium worm.
Minimum score of 10k in every mission.
Stop the brutality inflicted by the PDF.
Complete all challenges in a level.
A duel between rivals.
Use a future weapon in the past.
Successfully rescue HVI.
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.
Reinforcements on the way.
Capture Menendez.
Only one can survive.
Successfully assassinate SDC Chairman Tian Zhao.
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.
Successfully escort the VIPs to safety.
Gather information on Raul Menendez' suspected terrorist plot.
Plastic surgery avoided.
Take down Menendez and his operation.
Successfully neutralize the SDC freighter at Keppel Terminal.
Successfully defend FOB Spectre from incursion.
Gather intel on Raul Menendez from Mullah Rahmaan.
Investigate the jungle facility.
Rescue Woods.
Stop Menendez once and for all.
Complete a level with customized loadout.
Jailor or executioner.
Complete 1 challenge in any level.