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