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