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