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