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