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