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.
Buy all items from the Survival Air Support Armory.
Buy all items from the Survival Weapon Armory.
Collect 46 Intel Items.
Kill 9 enemies with A-10 strafing runs in "Scorched Earth."
Kill 5 enemies with a single grenade in Single Player or Special Ops.
Destroy 3 tanks with a single 105mm shot in "Iron Lady."
Take down a chopper with an AC-130 smoke grenade in "Bag and Drag."
Collect 22 Intel Items.
Earn 1 star in each mission of Special Ops Mission Mode.
Earn 48 stars in Special Ops Mission Mode.
Reach Wave 15 in each mission of Special Ops Survival mode.
Reach Wave 10 in each mission of Special Ops Survival mode.
Destroy all targets during the mortar sequence with only 4 shells in "Back on the Grid."
Destroy all the choppers with only the UGV's grenade launcher in "Persona Non Grata."
Have $50,000 current balance in a Special Ops Survival game.
Buy all items from the Survival Equipment Armory.
Complete a Special Ops Mission Mode game with the same number of kills as your partner.
Kill 2 enemy helicopters without getting hit in a Special Ops Survival game.
Complete a Special Ops Mission Mode game on Hardened or Veteran with no player getting downed.
Kill 30 enemies with the XM25 in "Black Tuesday."
Finish a Juggernaut with a knife in Special Ops.
Melee 5 enemies in a row in Single Player or Special Ops.
Survive 1 wave in a Special Ops Survival game.
Earn 1 star in Special Ops Mission Mode.
Complete "Scorched Earth", "Down the Rabbit Hole", and "Dust to Dust" on Veteran difficulty.
Complete the campaign on any difficulty.
Complete the campaign on Hardened or Veteran 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.
Complete "Eye of the Storm", "Blood Brothers", and "Stronghold" on Veteran 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.
Complete "Bag and Drag" and "Iron Lady" on Veteran difficulty.
Track down Volk. Complete "Bag and Drag" on any difficulty.
Assault the shipping company. Complete "Return to Sender" on any difficulty.
Complete "Mind the Gap", "Goalpost", and "Return to Sender" on Veteran difficulty.
Kill 20 enemies with the Chopper Gunner in a single run in "Return to Sender."
Save the US Vice President. Complete "Goalpost" on any difficulty.
Make it to Westminster. Complete "Mind the Gap" on any difficulty.
Infiltrate the village. Complete "Back on the Grid" on any difficulty.
Complete "Persona Non Grata", "Turbulence", and "Back on the Grid" on Veteran 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.
Complete "Black Tuesday" and "Hunter Killer" on Veteran difficulty.
Destroy the Jamming Tower. Complete "Black Tuesday" on any difficulty.
Start the Single Player Campaign on any difficulty.
Destroy all helicopters in the "Vertigo" Special Ops mission.
Complete the "Vertigo" Special Ops mission on any difficulty.
Complete the "Vertigo" Special Ops mission on Veteran difficulty.
Kill all juggernauts after they land on Veteran difficulty in the "Vertigo" Special Ops mission.
Stab five stunned enemies in a row in the "Light 'Em Up" Special Ops mission.
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 "Special Delivery" Special Ops mission on any difficulty.
Complete the "Special Delivery" Special Ops mission on Veteran difficulty.
Complete the "Light 'Em Up" Special Ops mission on any difficulty.
Complete the "Light 'Em Up" Special Ops mission on Veteran difficulty.
Complete the "Arctic Recon" Special Ops mission in under 3:30.
Complete the "Arctic Recon" Special Ops mission on any difficulty.
Complete the "Arctic Recon" Special Ops mission on Veteran difficulty.
Destroy 6 helicopters in the "Kill Switch" 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.
Complete the "Kill Switch" Special Ops mission on Veteran difficulty.
Run over and kill 13 enemies with the snowmobile in the "Black Ice" Special Ops mission.
Rescue all the hostages in the Special Ops mission "Negotiator."
Complete the Special Ops mission "Negotiator" on any difficulty.
Complete the Special Ops mission "Negotiator" on Veteran difficulty.
Complete the "Black Ice" Special Ops mission on any difficulty.
Complete the "Black Ice" Special Ops mission on Veteran difficulty.