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