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