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