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