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