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.
In multiplayer, escape death 3 times by using the rope ascender.
Purchase a new multiplayer character.
Survive 10 explosions in multiplayer.
Complete the game.
Shoot a bundle of dynamite out of the air.
Kill 2 multiplayer enemies with a single explosive.
Kill 40 enemies with the shotgun.
Find 75% of all documents.
Complete all optional tombs.
Collect 75% of all relics.
Rope pull 5 enemies off edges.
Fully mod and completely upgrade any weapon.
Kill and loot 10 flying animals (crows and gulls).
Kill FeeFee the crab.
Kill 75 enemies with the rifle.
Purchase all skills in one category.
Loot 200 enemies.
Kill 25 unaware enemies.
Perform 15 finishers.
Collect 5000 pieces of salvage.
Force an enemy to drop dynamite that kills two people when exploding.
Find 25% of GPS caches.
Kill 35 enemies with the pistol.
Catch a player in a snare trap in multiplayer.
Collect 25% of all relics.
Perform 50 headshot kills in the single player campaign.
Kill 50 enemies with the bow.
Find 25% of all documents.
Complete one optional tomb.
Kill and loot 10 small animals (rabbits, chickens, rats).
Complete one challenge.
Kill and loot 10 large animals (deer, boar, wolves).
Find 75% of GPS caches.
Find all documents, relics and GPS caches.
Purchase all skills in all categories.
Fully mod and completely upgrade all weapons.
Shoot 10 enemies off zip lines.
Incapacitate 25 enemies with dodge counter.
Complete all challenges.
Complete all conversations with the Endurance crew.
Complete a match in all multiplayer modes.
Kill 20 enemy players in multiplayer using a turret.
Kill a zip-lining enemy player 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.
Reach level 10 in multiplayer.
Buy every upgrade and character in multiplayer.
Reach level 60 in multiplayer.