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