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