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