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