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.
Win a ranked match in every multiplayer mode.
Reach level 60 in multiplayer.
Complete all conversations with the Endurance crew.
Shoot 10 enemies off zip lines.
Rope pull 5 enemies off edges.
Find all documents, relics and GPS caches.
Complete all challenges.
Complete all optional tombs.
Incapacitate 25 enemies with dodge counter.
Fully mod and completely upgrade all weapons.
Revive a teammate in a multiplayer match.
In multiplayer, escape death 3 times by using the rope ascender.
Kill a zip-lining enemy player in multiplayer.
Kill 10 multiplayer enemies using your melee attack.
Purchase all skills in all categories.
Complete the game.
Find 75% of GPS caches.
Fully mod and completely upgrade any weapon.
Find 75% of all documents.
Kill 20 enemy players in multiplayer using a turret.
Complete a match in all multiplayer modes.
Survive 10 explosions in multiplayer.
Kill 40 enemies with the shotgun.
Collect 75% of all relics.
Kill FeeFee the crab.
Kill and loot 10 flying animals (crows and gulls).
Loot 200 enemies.
Purchase all skills in one category.
Kill 75 enemies with the rifle.
Kill 25 unaware enemies.
Perform 15 finishers.
Shoot a bundle of dynamite out of the air.
Collect 5000 pieces of salvage.
Find 25% of GPS caches.
Force an enemy to drop dynamite that kills two people when exploding.
Kill 50 enemies with the bow.
Kill 35 enemies with the pistol.
Collect 25% of all relics.
Kill and loot 10 small animals (rabbits, chickens, rats).
Perform 50 headshot kills in the single player campaign.
Kill 2 multiplayer enemies with a single explosive.
Reach level 10 in multiplayer.
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 a new multiplayer character.
Find 25% of all documents.
Complete one challenge.
Kill and loot 10 large animals (deer, boar, wolves).
Complete one optional tomb.