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.
Fully mod and completely upgrade all weapons.
Find all documents, relics and GPS caches.
Complete the game.
Purchase all skills in all categories.
Complete all challenges.
Incapacitate 25 enemies with dodge counter.
Fully mod and completely upgrade any weapon.
Complete all optional tombs.
Complete all conversations with the Endurance crew.
Find 75% of all documents.
Collect 75% of all relics.
Find 75% of GPS caches.
Kill and loot 10 flying animals (crows and gulls).
Kill FeeFee the crab.
Kill 40 enemies with the shotgun.
Kill 75 enemies with the rifle.
Loot 200 enemies.
Kill 25 unaware enemies.
Purchase all skills in one category.
Shoot a bundle of dynamite out of the air.
Collect 5000 pieces of salvage.
Perform 15 finishers.
Reach level 60 in multiplayer.
Shoot 10 enemies off zip lines.
Force an enemy to drop dynamite that kills two people when exploding.
Rope pull 5 enemies off edges.
Perform 50 headshot kills in the single player campaign.
Kill 35 enemies with the pistol.
Find 25% of GPS caches.
Collect 25% of all relics.
Kill 50 enemies with the bow.
Find 25% of all documents.
Win a ranked match in every multiplayer mode.
Buy every upgrade and character in multiplayer.
In multiplayer, escape death 3 times by using the rope ascender.
Kill 20 enemy players in multiplayer using a turret.
Kill 2 multiplayer enemies with a single explosive.
Kill a zip-lining enemy player in multiplayer.
Kill 10 multiplayer enemies using your melee attack.
Survive 10 explosions in multiplayer.
Kill and loot 10 small animals (rabbits, chickens, rats).
Revive a teammate in a multiplayer match.
Complete a match in all multiplayer modes.
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.
Catch a player in a snare trap in multiplayer.
Complete one challenge.
Kill and loot 10 large animals (deer, boar, wolves).
Complete one optional tomb.