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