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