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 future levels in veteran.
Complete all challenges in Black Ops II.
Complete the campaign on Hardened or Veteran difficulty.
A duel between rivals.
Reinforcements on the way.
Crack the celerium worm.
Collect all intel.
Stop the brutality inflicted by the PDF.
Complete all challenges in a level.
Complete "Pyrrhic Victory", "Old Wounds", "Time And Fate", and "Suffer With Me" in Veteran.
Minimum score of 10k in every mission.
Successfully assassinate SDC Chairman Tian Zhao.
Successfully rescue HVI.
Successfully escort the VIPs to safety.
Successfully neutralize the SDC freighter at Keppel Terminal.
There are two futures.
Take down Menendez and his operation.
Gather information on Raul Menendez' suspected terrorist plot.
Plastic surgery avoided.
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.
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.
Successfully defend FOB Spectre from incursion.
Gather intel on Raul Menendez from Mullah Rahmaan.
Investigate the jungle facility.
Complete 1 challenge in any level.
Rescue Woods.
Complete a level with customized loadout.