Full list of all 76 Call of Duty: Modern Warfare 3 achievements. It takes around 25-30 hours to unlock all of the achievements in the base game on Windows.
The base game contains 50 achievements, and there are 3 DLC packs containing 26 achievements.
Earn 1 star in each mission of Special Ops Mission Mode.
Complete a Special Ops Mission Mode game on Hardened or Veteran with no player getting downed.
Complete a Special Ops Mission Mode game with the same number of kills as your partner.
Collect 46 Intel Items.
Kill 2 enemy helicopters without getting hit in a Special Ops Survival game.
Finish a Juggernaut with a knife in Special Ops.
Kill 20 enemies with the Chopper Gunner in a single run in "Return to Sender."
Kill 9 enemies with A-10 strafing runs in "Scorched Earth."
Destroy all targets during the mortar sequence with only 4 shells in "Back on the Grid."
Kill 5 enemies with a single grenade in Single Player or Special Ops.
Destroy all the choppers with only the UGV's grenade launcher in "Persona Non Grata."
Kill 30 enemies with the XM25 in "Black Tuesday."
Survive 1 wave in a Special Ops Survival game.
Complete "Scorched Earth", "Down the Rabbit Hole", and "Dust to Dust" on Veteran difficulty.
Complete the campaign on Hardened or Veteran difficulty.
Complete "Eye of the Storm", "Blood Brothers", and "Stronghold" on Veteran difficulty.
Complete "Bag and Drag" and "Iron Lady" on Veteran difficulty.
Destroy 3 tanks with a single 105mm shot in "Iron Lady."
Complete "Mind the Gap", "Goalpost", and "Return to Sender" on Veteran difficulty.
Collect 22 Intel Items.
Complete "Persona Non Grata", "Turbulence", and "Back on the Grid" on Veteran difficulty.
Complete "Black Tuesday" and "Hunter Killer" on Veteran difficulty.
Earn 1 star in Special Ops Mission Mode.
Complete the campaign on any difficulty.
Rescue the Russian President. Complete "Down the Rabbit Hole" on any difficulty.
Find the girl. Complete "Scorched Earth" on any difficulty.
Discover Makarov's next move. Complete "Stronghold" on any difficulty.
Escape the city. Complete "Blood Brothers" on any difficulty.
Reach the church. Complete "Eye of the Storm" on any difficulty.
Escape Paris with Volk. Complete "Iron Lady" on any difficulty.
Track down Volk. Complete "Bag and Drag" on any difficulty.
Take down a chopper with an AC-130 smoke grenade in "Bag and Drag."
Assault the shipping company. Complete "Return to Sender" on any difficulty.
Save the US Vice President. Complete "Goalpost" on any difficulty.
Make it to Westminster. Complete "Mind the Gap" on any difficulty.
Melee 5 enemies in a row in Single Player or Special Ops.
Infiltrate the village. Complete "Back on the Grid" on any difficulty.
Defend the Russian President. Complete "Turbulence" on any difficulty.
Kill all 5 enemies during the zero-g sequence in "Turbulence."
Escape the mountain safe house. Complete "Persona Non Grata" on any difficulty.
Take back New York Harbor. Complete "Hunter Killer" on any difficulty.
Destroy the Jamming Tower. Complete "Black Tuesday" on any difficulty.
Start the Single Player Campaign on any difficulty.
Buy all items from the Survival Weapon Armory.
Buy all items from the Survival Air Support Armory.
Buy all items from the Survival Equipment Armory.
Have $50,000 current balance in a Special Ops Survival game.
Reach Wave 10 in each mission of Special Ops Survival mode.
Reach Wave 15 in each mission of Special Ops Survival mode.
Earn 48 stars in Special Ops Mission Mode.
Complete the "Arctic Recon" Special Ops mission on any difficulty.
Complete the "Arctic Recon" Special Ops mission on Veteran difficulty.
Complete the "Arctic Recon" Special Ops mission in under 3:30.
Complete the "Vertigo" Special Ops mission on any difficulty.
Complete the "Vertigo" Special Ops mission on Veteran difficulty.
Destroy all helicopters in the "Vertigo" Special Ops mission.
Kill all juggernauts after they land on Veteran difficulty in the "Vertigo" Special Ops mission.
Complete the "Special Delivery" Special Ops mission on any difficulty.
Complete the "Special Delivery" Special Ops mission on Veteran difficulty.
Use exactly one of each care package in the "Special Delivery" Special Ops mission.
Use only one self revive care package in the "Special Delivery" Special Ops mission.
Complete the "Light 'Em Up" Special Ops mission on any difficulty.
Complete the "Light 'Em Up" Special Ops mission on Veteran difficulty.
Stab five stunned enemies in a row in the "Light 'Em Up" Special Ops mission.
Complete the "Iron Clad" Special Ops mission on any difficulty.
Complete the "Iron Clad" Special Ops mission on Veteran difficulty.
Finish with your tank at full health in the "Iron Clad" Special Ops mission.
Complete the "Kill Switch" Special Ops mission on any difficulty.
Destroy 6 helicopters in the "Kill Switch" Special Ops mission.
Complete the "Kill Switch" Special Ops mission on Veteran difficulty.
Complete the Special Ops mission "Negotiator" on any difficulty.
Rescue all the hostages in the Special Ops mission "Negotiator."
Complete the Special Ops mission "Negotiator" on Veteran difficulty.
Complete the "Black Ice" Special Ops mission on any difficulty.
Run over and kill 13 enemies with the snowmobile in the "Black Ice" Special Ops mission.
Complete the "Black Ice" Special Ops mission on Veteran difficulty.