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.
In multiplayer, escape death 3 times by using the rope ascender.
Purchase a new multiplayer character.
Win a ranked match in every multiplayer mode.
Complete a match in all multiplayer modes.
Reach level 10 in multiplayer.
Kill 20 enemy players in multiplayer using a turret.
Kill 10 multiplayer enemies using your melee attack.
Kill a zip-lining enemy player in multiplayer.
Catch a player in a snare trap in multiplayer.
Kill 2 multiplayer enemies with a single explosive.
Revive a teammate in a multiplayer match.
In multiplayer, be the only player on your team that isn't dead or downed.
Fully mod and completely upgrade all weapons.
Purchase all skills in all categories.
Complete the game.
Kill and loot 10 small animals (rabbits, chickens, rats).
Kill 40 enemies with the shotgun.
Kill 35 enemies with the pistol.
Complete all optional tombs.
Find 75% of all documents.
Complete all conversations with the Endurance crew.
Find 75% of GPS caches.
Collect 75% of all relics.
Fully mod and completely upgrade any weapon.
Rope pull 5 enemies off edges.
Kill 75 enemies with the rifle.
Kill FeeFee the crab.
Kill 25 unaware enemies.
Force an enemy to drop dynamite that kills two people when exploding.
Purchase all skills in one category.
Loot 200 enemies.
Collect 5000 pieces of salvage.
Shoot a bundle of dynamite out of the air.
Find 25% of GPS caches.
Perform 15 finishers.
Kill 50 enemies with the bow.
Collect 25% of all relics.
Perform 50 headshot kills in the single player campaign.
Find 25% of all documents.
Complete one optional tomb.
Complete one challenge.
Kill and loot 10 large animals (deer, boar, wolves).
Find all documents, relics and GPS caches.
Kill and loot 10 flying animals (crows and gulls).
Shoot 10 enemies off zip lines.
Incapacitate 25 enemies with dodge counter.
Complete all challenges.
Survive 10 explosions in multiplayer.
Buy every upgrade and character in multiplayer.
Reach level 60 in multiplayer.