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