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.
Reinforcements on the way.
Crack the celerium worm.
Complete all challenges in Black Ops II.
Minimum score of 10k in every mission.
Successfully assassinate SDC Chairman Tian Zhao.
Listen and think before you shoot.
Successfully rescue HVI.
Successfully escort the VIPs to safety.
Complete all challenges in a level.
Successfully neutralize the SDC freighter at Keppel Terminal.
Successfully defend FOB Spectre from incursion.
Stop the brutality inflicted by the PDF.
Use a future weapon in the past.
There are two futures.
Collect all intel.
Only one can survive.
Plastic surgery avoided.
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.
Capture Menendez.
Capture Manuel Noriega and bring him to justice.
Complete "Pyrrhic Victory", "Old Wounds", "Time And Fate", and "Suffer With Me" in Veteran.
Find the Karma weapon.
Gather information on Raul Menendez' suspected terrorist plot.
Take down Menendez and his operation.
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.