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