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