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