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