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