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