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