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