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