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