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