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