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