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