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