Here is the full list of all 50 Call of Duty: Modern Warfare 2 Campaign Remastered achievements worth 1,000 gamerscore.
Collect 45 enemy intel items.
Complete every missions without dying or reloading to a checkpoint at any difficulty.
Collect 22 enemy intel items.
Kill 20 enemies in a row while driving a vehicle.
Plant the C4 in 'Cliffhanger' without alerting or injuring anyone in the blizzard.
Destroy 10 choppers using the Javelin Launcher in 'Of Their Own Accord'.
Kill 11 enemies using Claymores in 'Loose Ends'.
Destroy both BTRs without using Predator Drones in 'Wolverines!'
Destroy the helicopter using frag grenades in 'The Only Easy Day... Was Yesterday'.
Do not get your Predator Drone destroyed in 'Contingency'.
Kill 5 enemies in a row using 5 different weapons or attachments.
Kill 2 rappelling enemies in a row before they land on their feet.
Kill 10 enemies in a row using akimbo weapons.
Kill an enemy with the impact damage from a frag grenade to the head.
Kill 7 chickens in under 10 seconds in 'The Hornet's Nest'.
Complete any mission but 'S.S.D.D.' and 'Endgame' without reloading weapons or using melee attacks.
Beat BX time in 'S.S.D.D.'.
Run The Pit in 'S.S.D.D.' and finish with a final time under 30 seconds.
Kill Shepherd.
The U.S. Army Rangers ain’t no place for clowns.
Ring the red bell in both rooms and survive the attack.
Complete the single player campaign on any difficulty.
Complete the single player campaign on Hardened or Veteran difficulty.
Complete 'Just Like Old Times' and 'Endgame' on Veteran difficulty.
Complete the mission in the airplane graveyard.
Complete 'Loose Ends' and 'The Enemy of My Enemy' on Veteran difficulty.
Assault Makarov's safehouse.
Take back Whiskey Hotel.
Complete 'Of Their Own Accord', 'Second Sun', and 'Whiskey Hotel' on Veteran difficulty.
Execute the plan to help the Americans.
Complete 'Contingency' on Veteran difficulty.
Storm the gulag.
Complete 'The Only Easy Day... Was Yesterday' and 'The Gulag' on Veteran difficulty.
Use a Riot shield to beat down an enemy.
Kill 4 enemies with 4 shots during a slow-mo breach.
Complete 'Wolverines!' and 'Exodus' on Veteran difficulty.
Instruct the Honey Badger to kill 80 enemies in 'Exodus'.
Complete 'Takedown' and 'The Hornet's Nest' on Veteran difficulty.
Defend Burger Town.
Kill at least 10 enemies with one Predator Missile.
Kill 6 enemies in a row using a thermal weapon.
Find Rojas in the Favelas.
Infiltrate the snowy mountain side base.
Complete 'Cliffhanger' on Veteran difficulty.
Knife an enemy without him ever knowing you were there.
Get hand picked for Shepherd's elite squad.
Complete 'S.S.D.D.' and 'Team Player' on Veteran difficulty.
Kill 2 enemies with a single bullet.
Kill at least 3 enemies with a single shot from a grenade launcher.
Help train the local militia.