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