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.
Force an enemy to drop dynamite that kills two people when exploding.
Incapacitate 25 enemies with dodge counter.
Buy every upgrade and character in multiplayer.
Reach level 60 in multiplayer.
Shoot 10 enemies off zip lines.
Win a ranked match in every multiplayer mode.
Complete a match in all multiplayer modes.
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.
Purchase a new multiplayer character.
Kill 10 multiplayer enemies using your melee attack.
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.
Reach level 10 in multiplayer.
Survive 10 explosions in multiplayer.
Complete all challenges.
Find all documents, relics and GPS caches.
Rope pull 5 enemies off edges.
Fully mod and completely upgrade all weapons.
Complete all optional tombs.
Complete all conversations with the Endurance crew.
Purchase all skills in all categories.
In multiplayer, escape death 3 times by using the rope ascender.
Kill and loot 10 flying animals (crows and gulls).
Complete the game.
Fully mod and completely upgrade any weapon.
Kill 40 enemies with the shotgun.
Kill and loot 10 small animals (rabbits, chickens, rats).
Shoot a bundle of dynamite out of the air.
Find 75% of all documents.
Find 75% of GPS caches.
Collect 75% of all relics.
Purchase all skills in one category.
Kill FeeFee the crab.
Kill and loot 10 large animals (deer, boar, wolves).
Kill 75 enemies with the rifle.
Loot 200 enemies.
Kill 50 enemies with the bow.
Kill 25 unaware enemies.
Perform 50 headshot kills in the single player campaign.
Collect 5000 pieces of salvage.
Kill 35 enemies with the pistol.
Find 25% of GPS caches.
Perform 15 finishers.
Collect 25% of all relics.
Find 25% of all documents.
Complete one optional tomb.
Complete one challenge.