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