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