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