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