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