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.
Reach level 60 in multiplayer.
Buy every upgrade and character in multiplayer.
Complete all challenges.
Complete all optional tombs.
Win a ranked match in every multiplayer mode.
Kill a zip-lining enemy player in multiplayer.
Fully mod and completely upgrade all weapons.
Incapacitate 25 enemies with dodge counter.
Rope pull 5 enemies off edges.
Find all documents, relics and GPS caches.
Catch a player in a snare trap in multiplayer.
Perform 15 finishers.
Survive 10 explosions in multiplayer.
Kill 20 enemy players in multiplayer using a turret.
Find 75% of GPS caches.
Purchase all skills in all categories.
Complete the game.
Purchase all skills in one category.
Collect 75% of all relics.
Complete all conversations with the Endurance crew.
Reach level 10 in multiplayer.
Purchase a new multiplayer character.
Kill 10 multiplayer enemies using your melee attack.
Find 75% of all documents.
Revive a teammate in a multiplayer match.
Kill and loot 10 flying animals (crows and gulls).
Kill FeeFee the crab.
Shoot 10 enemies off zip lines.
Complete one challenge.
Kill 2 multiplayer enemies with a single explosive.
In multiplayer, escape death 3 times by using the rope ascender.
Fully mod and completely upgrade any weapon.
Complete a match in all multiplayer modes.
Kill 40 enemies with the shotgun.
Find 25% of all documents.
Collect 25% of all relics.
Find 25% of GPS caches.
Collect 5000 pieces of salvage.
Loot 200 enemies.
Kill and loot 10 large animals (deer, boar, wolves).
Kill and loot 10 small animals (rabbits, chickens, rats).
Perform 50 headshot kills in the single player campaign.
Kill 50 enemies with the bow.
Kill 75 enemies with the rifle.
Kill 35 enemies with the pistol.
Force an enemy to drop dynamite that kills two people when exploding.
Kill 25 unaware enemies.
Complete one optional tomb.
Shoot a bundle of dynamite out of the air.
In multiplayer, be the only player on your team that isn't dead or downed.