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