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.
Incapacitate 25 enemies with dodge counter.
Kill a zip-lining enemy player in multiplayer.
Kill 20 enemy players in multiplayer using a turret.
Win a ranked match in every multiplayer mode.
Fully mod and completely upgrade all weapons.
Find all documents, relics and GPS caches.
Complete the game.
Kill and loot 10 flying animals (crows and gulls).
Complete all challenges.
Purchase all skills in all categories.
Fully mod and completely upgrade any weapon.
Complete all optional tombs.
Find 75% of all documents.
Find 75% of GPS caches.
Rope pull 5 enemies off edges.
Shoot a bundle of dynamite out of the air.
Perform 15 finishers.
Collect 75% of all relics.
Kill 75 enemies with the rifle.
Kill FeeFee the crab.
Loot 200 enemies.
Kill 40 enemies with the shotgun.
Purchase all skills in one category.
Complete one optional tomb.
Collect 5000 pieces of salvage.
Find 25% of GPS caches.
Complete all conversations with the Endurance crew.
Collect 25% of all relics.
Shoot 10 enemies off zip lines.
Kill 25 unaware enemies.
Force an enemy to drop dynamite that kills two people when exploding.
Kill 35 enemies with the pistol.
Perform 50 headshot kills in the single player campaign.
Kill 50 enemies with the bow.
Find 25% of all documents.
Kill and loot 10 small animals (rabbits, chickens, rats).
Complete one challenge.
Kill and loot 10 large animals (deer, boar, wolves).
Kill 2 multiplayer enemies with a single explosive.
In multiplayer, escape death 3 times by using the rope ascender.
Survive 10 explosions in multiplayer.
Kill 10 multiplayer enemies using your melee attack.
Revive a teammate in a multiplayer match.
Complete a match in all multiplayer modes.
Reach level 10 in multiplayer.
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.