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.
Kill 20 enemy players in multiplayer using a turret.
Win a ranked match in every multiplayer mode.
Reach level 60 in multiplayer.
Rope pull 5 enemies off edges.
Shoot 10 enemies off zip lines.
Kill and loot 10 flying animals (crows and gulls).
Complete all conversations with the Endurance crew.
Complete the game.
Find all documents, relics and GPS caches.
Purchase all skills in all categories.
Fully mod and completely upgrade all weapons.
Complete all challenges.
Complete all optional tombs.
Find 75% of GPS caches.
Purchase all skills in one category.
Kill 40 enemies with the shotgun.
Collect 75% of all relics.
Find 75% of all documents.
Kill FeeFee the crab.
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.
In multiplayer, escape death 3 times by using the rope ascender.
Purchase a new multiplayer character.
Reach level 10 in multiplayer.
Buy every upgrade and character in multiplayer.
Complete a match in all multiplayer modes.
Kill a zip-lining enemy player in multiplayer.
Catch a player in a snare trap in multiplayer.
Survive 10 explosions in multiplayer.
Revive a teammate in a multiplayer match.
Fully mod and completely upgrade any weapon.
Shoot a bundle of dynamite out of the air.
Kill 75 enemies with the rifle.
Loot 200 enemies.
Force an enemy to drop dynamite that kills two people when exploding.
Perform 15 finishers.
Collect 5000 pieces of salvage.
Kill 25 unaware enemies.
Find 25% of GPS caches.
Kill 50 enemies with the bow.
Collect 25% of all relics.
Complete one challenge.
Find 25% of all documents.
Kill and loot 10 small animals (rabbits, chickens, rats).
Kill 35 enemies with the pistol.
Perform 50 headshot kills in the single player campaign.
Complete one optional tomb.
Kill and loot 10 large animals (deer, boar, wolves).