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