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 "Pyrrhic Victory", "Old Wounds", "Time And Fate", and "Suffer With Me" 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.
Listen and think before you shoot.
There are two futures.
Successfully assassinate SDC Chairman Tian Zhao.
Stop the brutality inflicted by the PDF.
Use a future weapon in the past.
Collect all intel.
Complete all challenges in a level.
Minimum score of 10k in every mission.
Stop Menendez once and for all.
Complete a level with customized loadout.
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.
Successfully neutralize the SDC freighter at Keppel Terminal.
Successfully escort the VIPs to safety.
Successfully rescue HVI.
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.
Investigate the jungle facility.
Complete 1 challenge in any level.
Rescue Woods.