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.
Buy every upgrade and character in multiplayer.
Reach level 60 in multiplayer.
Incapacitate 25 enemies with dodge counter.
Shoot 10 enemies off zip lines.
Shoot a bundle of dynamite out of the air.
Kill 40 enemies with the shotgun.
Rope pull 5 enemies off edges.
Win a ranked match in every multiplayer mode.
Complete a match in all multiplayer modes.
Complete all conversations with the Endurance crew.
In multiplayer, escape death 3 times by using the rope ascender.
Survive 10 explosions in multiplayer.
Revive a teammate in a multiplayer match.
Kill 2 multiplayer enemies with a single explosive.
Kill a zip-lining enemy player in multiplayer.
Kill 10 multiplayer enemies using your melee attack.
Reach level 10 in multiplayer.
Catch a player in a snare trap in multiplayer.
Kill 20 enemy players in multiplayer using a turret.
Purchase a new multiplayer character.
In multiplayer, be the only player on your team that isn't dead or downed.
Complete all challenges.
Find all documents, relics and GPS caches.
Fully mod and completely upgrade all weapons.
Complete the game.
Purchase all skills in all categories.
Kill and loot 10 flying animals (crows and gulls).
Find 75% of GPS caches.
Find 75% of all documents.
Complete all optional tombs.
Collect 75% of all relics.
Kill 75 enemies with the rifle.
Fully mod and completely upgrade any weapon.
Kill FeeFee the crab.
Kill and loot 10 large animals (deer, boar, wolves).
Purchase all skills in one category.
Loot 200 enemies.
Kill 25 unaware enemies.
Kill 50 enemies with the bow.
Collect 5000 pieces of salvage.
Complete one challenge.
Kill and loot 10 small animals (rabbits, chickens, rats).
Force an enemy to drop dynamite that kills two people when exploding.
Find 25% of GPS caches.
Perform 15 finishers.
Kill 35 enemies with the pistol.
Collect 25% of all relics.
Find 25% of all documents.
Perform 50 headshot kills in the single player campaign.
Complete one optional tomb.