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