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