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