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