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.
Rope pull 5 enemies off edges.
Incapacitate 25 enemies with dodge counter.
Complete all conversations with the Endurance crew.
Complete all challenges.
Find all documents, relics and GPS caches.
Complete the game.
Purchase all skills in all categories.
Fully mod and completely upgrade all weapons.
Kill 20 enemy players in multiplayer using a turret.
Survive 10 explosions in multiplayer.
Revive a teammate in a multiplayer match.
Win a ranked match in every multiplayer mode.
Kill 10 multiplayer enemies using your melee attack.
In multiplayer, escape death 3 times by using the rope ascender.
Reach level 10 in multiplayer.
Buy every upgrade and character in multiplayer.
Reach level 60 in multiplayer.
Complete a match in all multiplayer modes.
Shoot a bundle of dynamite out of the air.
Kill a zip-lining enemy player in multiplayer.
Kill 2 multiplayer enemies with a single explosive.
Purchase a new multiplayer character.
Complete one challenge.
Fully mod and completely upgrade any weapon.
Kill FeeFee the crab.
Complete all optional tombs.
Find 75% of all documents.
Kill 40 enemies with the shotgun.
Catch a player in a snare trap in multiplayer.
In multiplayer, be the only player on your team that isn't dead or downed.
Collect 75% of all relics.
Kill 75 enemies with the rifle.
Find 75% of GPS caches.
Shoot 10 enemies off zip lines.
Kill and loot 10 flying animals (crows and gulls).
Purchase all skills in one category.
Loot 200 enemies.
Collect 5000 pieces of salvage.
Force an enemy to drop dynamite that kills two people when exploding.
Kill 35 enemies with the pistol.
Kill and loot 10 large animals (deer, boar, wolves).
Collect 25% of all relics.
Find 25% of GPS caches.
Perform 50 headshot kills in the single player campaign.
Kill 25 unaware enemies.
Kill 50 enemies with the bow.
Find 25% of all documents.
Perform 15 finishers.
Kill and loot 10 small animals (rabbits, chickens, rats).
Complete one optional tomb.