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