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