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.
Shoot a bundle of dynamite out of the air.
Complete all conversations with the Endurance crew.
Kill and loot 10 flying animals (crows and gulls).
Kill and loot 10 small animals (rabbits, chickens, rats).
Fully mod and completely upgrade all weapons.
Find all documents, relics and GPS caches.
Complete all challenges.
Complete all optional tombs.
Purchase all skills in all categories.
Fully mod and completely upgrade any weapon.
Find 75% of GPS caches.
Collect 75% of all relics.
Complete the game.
Kill 75 enemies with the rifle.
Find 75% of all documents.
Kill 40 enemies with the shotgun.
Loot 200 enemies.
Kill FeeFee the crab.
Kill 35 enemies with the pistol.
Purchase all skills in one category.
Perform 15 finishers.
Find 25% of GPS caches.
Collect 5000 pieces of salvage.
Kill 25 unaware enemies.
Force an enemy to drop dynamite that kills two people when exploding.
Kill and loot 10 large animals (deer, boar, wolves).
Collect 25% of all relics.
Kill 50 enemies with the bow.
Complete one challenge.
Complete one optional tomb.
Perform 50 headshot kills in the single player campaign.
Find 25% of all documents.
Rope pull 5 enemies off edges.
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.
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.
Reach level 60 in multiplayer.