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