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