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