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