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