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