Here is the full list of all 50 Tomb Raider achievements. It takes around 40-50 hours to unlock all of the achievements on Windows.
Rope pull 5 enemies off edges.
Incapacitate 25 enemies with dodge counter.
Shoot 10 enemies off zip lines.
Kill a zip-lining enemy player in multiplayer.
Kill 10 multiplayer enemies using your melee attack.
Kill 20 enemy players in multiplayer using a turret.
Purchase a new multiplayer character.
Kill and loot 10 flying animals (crows and gulls).
Complete all challenges.
Find all documents, relics and GPS caches.
Complete all optional tombs.
Kill 40 enemies with the shotgun.
Purchase all skills in all categories.
Find 75% of GPS caches.
Fully mod and completely upgrade all weapons.
Complete one challenge.
Reach level 10 in multiplayer.
Catch a player in a snare trap in multiplayer.
In multiplayer, be the only player on your team that isn't dead or downed.
Complete the game.
Kill 75 enemies with the rifle.
Collect 75% of all relics.
Purchase all skills in one category.
Fully mod and completely upgrade any weapon.
Find 75% of all documents.
Kill FeeFee the crab.
Find 25% of GPS caches.
Kill and loot 10 large animals (deer, boar, wolves).
Kill 25 unaware enemies.
Loot 200 enemies.
Kill 50 enemies with the bow.
Perform 15 finishers.
Collect 5000 pieces of salvage.
Collect 25% of all relics.
Force an enemy to drop dynamite that kills two people when exploding.
Kill 35 enemies with the pistol.
Perform 50 headshot kills in the single player campaign.
Complete one optional tomb.
Find 25% of all documents.
Kill and loot 10 small animals (rabbits, chickens, rats).
Shoot a bundle of dynamite out of the air.
Complete all conversations with the Endurance crew.
Complete a match in all multiplayer modes.
Survive 10 explosions in multiplayer.
Revive a teammate in a multiplayer match.
Win a ranked match in every multiplayer mode.
Kill 2 multiplayer enemies with a single explosive.
In multiplayer, escape death 3 times by using the rope ascender.
Buy every upgrade and character in multiplayer.
Reach level 60 in multiplayer.