Here is the full list of all 27 Call of Duty: Modern Warfare achievements.
Reach Barkov's lab entrance using only drone strikes.
Only use one cinder block and bring it to the end of 'Embedded'.
Complete every single player mission on Veteran or Realism difficulty.
Finish single player on any difficulty.
Spit on Barkov.
Kill 3 enemies while you are on a ladder.
Shut off the power to 4 buildings in 'Going Dark'.
Get at least one kill with eight different weapons when completing 'Old Comrades'.
Never get hit by the sniper while escaping captivity.
Complete 'The Wolf's Den' tunnels using only the 1911.
Kill both soldiers with one shot in 'Hometown'.
Stop three APCs with Hadir's sniper rifle.
Shoot the driver of the suicide truck.
Kill an enemy with a direct hit from a smoke grenade.
Blow up 3 tripwires with explosives.
Save Alpha 3-2 from being downed.
Take down a flying helicopter with a molotov.
Crash a helicopter by shooting the pilot.
Kill all the enemies in the 'Embedded' field of dead bodies.
Kill at least one enemy while inside The Reading Place, Aural Chic, and both Subway undergrounds.
Do not injure any civilians in 'Piccadilly'.
Neutralize the 'Fog of War' machine gun with a frag grenade.
Burn 4 enemies with a single molotov.
Complete 'Clean House' without being hit using one bullet per threat.
Destroy 4 trucks with 4 drone strikes before they reach the end of their path in 'The Embassy'.
Kill all enemies at the Church, Clocktower, and Pool without anyone calling for backup.
Complete all Special Operations missions.