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.
Buy every upgrade and character in multiplayer.
Reach level 60 in multiplayer.
Complete all conversations with the Endurance crew.
Incapacitate 25 enemies with dodge counter.
Shoot a bundle of dynamite out of the air.
Complete a match in all multiplayer modes.
Survive 10 explosions in multiplayer.
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.
Kill 10 multiplayer enemies using your melee attack.
In multiplayer, escape death 3 times by using the rope ascender.
Kill a zip-lining enemy player in multiplayer.
Kill 20 enemy players in multiplayer using a turret.
Complete the game.
Find all documents, relics and GPS caches.
Purchase all skills in all categories.
Fully mod and completely upgrade all weapons.
Complete all challenges.
Complete all optional tombs.
Find 75% of all documents.
Rope pull 5 enemies off edges.
Find 75% of GPS caches.
Fully mod and completely upgrade any weapon.
Collect 75% of all relics.
Kill FeeFee the crab.
Kill and loot 10 flying animals (crows and gulls).
Kill 75 enemies with the rifle.
Loot 200 enemies.
Kill 40 enemies with the shotgun.
Kill 25 unaware enemies.
Force an enemy to drop dynamite that kills two people when exploding.
Shoot 10 enemies off zip lines.
Purchase all skills in one category.
Collect 5000 pieces of salvage.
Kill 50 enemies with the bow.
Find 25% of GPS caches.
Kill 35 enemies with the pistol.
Perform 15 finishers.
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 optional tomb.
Complete one challenge.
Purchase a new multiplayer character.
Reach level 10 in multiplayer.
Kill and loot 10 large animals (deer, boar, wolves).