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