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.
Complete all conversations with the Endurance crew.
Buy every upgrade and character in multiplayer.
Incapacitate 25 enemies with dodge counter.
Shoot 10 enemies off zip lines.
Win a ranked match in every multiplayer mode.
Survive 10 explosions in multiplayer.
Kill 10 multiplayer enemies using your melee attack.
Kill 20 enemy players in multiplayer using a turret.
In multiplayer, escape death 3 times by using the rope ascender.
Revive a teammate in a multiplayer match.
Complete a match in all multiplayer modes.
Kill 2 multiplayer enemies with a single explosive.
Purchase a new multiplayer character.
Reach level 10 in multiplayer.
Catch a player in a snare trap in multiplayer.
Rope pull 5 enemies off edges.
Shoot a bundle of dynamite out of the air.
Kill a zip-lining enemy player in multiplayer.
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.
Complete the game.
Fully mod and completely upgrade all weapons.
Complete all optional tombs.
Fully mod and completely upgrade any weapon.
Find 75% of GPS caches.
Loot 200 enemies.
Collect 75% of all relics.
Find 75% of all documents.
Kill 40 enemies with the shotgun.
Kill FeeFee the crab.
Kill and loot 10 flying animals (crows and gulls).
Purchase all skills in all categories.
Kill 75 enemies with the rifle.
Kill and loot 10 small animals (rabbits, chickens, rats).
Kill 25 unaware enemies.
Collect 5000 pieces of salvage.
Force an enemy to drop dynamite that kills two people when exploding.
Kill 35 enemies with the pistol.
Perform 50 headshot kills in the single player campaign.
Kill and loot 10 large animals (deer, boar, wolves).
Find 25% of GPS caches.
Perform 15 finishers.
Kill 50 enemies with the bow.
Collect 25% of all relics.
Purchase all skills in one category.
Find 25% of all documents.
Complete one optional tomb.
Complete one challenge.