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