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.
Reach level 60 in multiplayer.
Buy every upgrade and character in multiplayer.
Win a ranked match in every multiplayer mode.
Complete a match in all multiplayer modes.
In multiplayer, escape death 3 times by using the rope ascender.
Kill 20 enemy players in multiplayer using a turret.
Kill a zip-lining enemy player in multiplayer.
Kill 10 multiplayer enemies using your melee attack.
Catch a player in a snare trap in multiplayer.
Survive 10 explosions in multiplayer.
Kill 2 multiplayer enemies with a single explosive.
Purchase a new multiplayer character.
Reach level 10 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 the game.
Find all documents, relics and GPS caches.
Shoot a bundle of dynamite out of the air.
Fully mod and completely upgrade all weapons.
Complete all challenges.
Incapacitate 25 enemies with dodge counter.
Complete all optional tombs.
Complete all conversations with the Endurance crew.
Purchase all skills in all categories.
Find 75% of all documents.
Rope pull 5 enemies off edges.
Fully mod and completely upgrade any weapon.
Find 75% of GPS caches.
Collect 75% of all relics.
Kill FeeFee the crab.
Kill 50 enemies with the bow.
Loot 200 enemies.
Kill 40 enemies with the shotgun.
Purchase all skills in one category.
Shoot 10 enemies off zip lines.
Kill 75 enemies with the rifle.
Force an enemy to drop dynamite that kills two people when exploding.
Collect 5000 pieces of salvage.
Kill 25 unaware enemies.
Perform 15 finishers.
Find 25% of GPS caches.
Kill and loot 10 flying animals (crows and gulls).
Collect 25% of all relics.
Perform 50 headshot kills in the single player campaign.
Kill 35 enemies with the pistol.
Find 25% of all documents.
Complete one challenge.
Kill and loot 10 small animals (rabbits, chickens, rats).
Complete one optional tomb.
Kill and loot 10 large animals (deer, boar, wolves).