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