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