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.
A duel between rivals.
Crack the celerium worm.
Complete "Pyrrhic Victory", "Old Wounds", "Time And Fate", and "Suffer With Me" in Veteran.
There are two futures.
Complete all future levels in veteran.
Plastic surgery avoided.
Stop the brutality inflicted by the PDF.
Complete all challenges in Black Ops II.
Use a future weapon in the past.
Complete all challenges in a level.
Complete the campaign on Hardened or Veteran difficulty.
Collect all intel.
Minimum score of 10k in every mission.
Successfully rescue HVI.
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.
Capture Menendez.
Only one can survive.
Successfully assassinate SDC Chairman Tian Zhao.
Capture Manuel Noriega and bring him to justice.
Listen and think before you shoot.
Find the Karma weapon.
Successfully escort the VIPs to safety.
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.
Complete a level with customized loadout.
Gather information on Raul Menendez' suspected terrorist plot.
Complete 1 challenge in any level.
Rescue Woods.