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