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