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