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