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