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.
Crack the celerium worm.
Collect all intel.
Minimum score of 10k in every mission.
Reinforcements on the way.
Successfully rescue HVI.
Only one can survive.
Successfully assassinate SDC Chairman Tian Zhao.
Listen and think before you shoot.
Successfully escort the VIPs to safety.
Stop the brutality inflicted by the PDF.
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.
Stop Menendez once and for all.
Complete all future levels in veteran.
Complete the campaign on Hardened or Veteran difficulty.
Jailor or executioner.
Escort the president to the secure location in downtown LA.
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.
There are two futures.
Find the Karma weapon.
Gather information on Raul Menendez' suspected terrorist plot.
Plastic surgery avoided.
Take down Menendez and his operation.
Gather intel on Raul Menendez from Mullah Rahmaan.
Complete a level with customized loadout.
Investigate the jungle facility.
Complete 1 challenge in any level.
Rescue Woods.