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