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.
Buy every upgrade and character in multiplayer.
Reach level 60 in multiplayer.
Shoot 10 enemies off zip lines.
Force an enemy to drop dynamite that kills two people when exploding.
Shoot a bundle of dynamite out of the air.
Revive a teammate in a multiplayer match.
Kill and loot 10 flying animals (crows and gulls).
Incapacitate 25 enemies with dodge counter.
Win a ranked match in every multiplayer mode.
Kill 20 enemy players in multiplayer using a turret.
In multiplayer, escape death 3 times by using the rope ascender.
Kill a zip-lining enemy player in multiplayer.
Kill 10 multiplayer enemies using your melee attack.
Purchase a new multiplayer character.
Kill 2 multiplayer enemies with a single explosive.
Complete all conversations with the Endurance crew.
Survive 10 explosions in multiplayer.
Find all documents, relics and GPS caches.
Complete the game.
Kill 75 enemies with the rifle.
Purchase all skills in all categories.
Fully mod and completely upgrade all weapons.
Complete all challenges.
Complete all optional tombs.
Kill 40 enemies with the shotgun.
Find 75% of all documents.
Fully mod and completely upgrade any weapon.
Collect 75% of all relics.
Find 75% of GPS caches.
Rope pull 5 enemies off edges.
Purchase all skills in one category.
Kill and loot 10 small animals (rabbits, chickens, rats).
Kill FeeFee the crab.
Kill 35 enemies with the pistol.
Loot 200 enemies.
Kill 25 unaware enemies.
Collect 5000 pieces of salvage.
Find 25% of GPS caches.
Complete a match in all multiplayer modes.
Collect 25% of all relics.
Perform 50 headshot kills in the single player campaign.
Complete one optional tomb.
Kill 50 enemies with the bow.
Perform 15 finishers.
Reach level 10 in multiplayer.
Find 25% of all documents.
Complete one challenge.
Catch a player in a snare trap in multiplayer.
In multiplayer, be the only player on your team that isn't dead or downed.
Kill and loot 10 large animals (deer, boar, wolves).