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