Full list of all 99 Shadow of the Tomb Raider: Definitive Edition achievements. It takes around 60-80 hours to unlock all of the achievements in the base game.
The base game contains 63 achievements, and there are 7 DLC packs containing 36 achievements.
Burn 2 enemies simultaneously
Restore and equip a matching vestige outfit
Perform 3 headshots in 3 seconds with the pistol
Gather 40 gold ore
Lose the enemy 10 times
Perform 20 headshots with the bow
Complete a climb after finding the Overhang Climbing Gear
Get out of the Cenote alive
Stealth Takedown 25 enemies
Buy an item from a merchant
Find Paititi
Enter the Temple of Life's inner chamber
Perform a Stealth Takedown from a mud-covered wall
Complete a Side Mission
Get rid of the pillagers outside of Kuwaq Yaku
Kill 3 enemies while they are distracted
Defeat the Empress Jaguar
Decipher a Monolith
Purchase a Skill
Survive the flood
Remove the dagger from the Temple of the Moon
Decipher the Path of the Stars
Complete all Artifact Collections
Complete 3 main game Challenge Tombs
Complete all main game Challenge Tombs
Perform the Serpent's Fury 3 times
Fully upgrade a weapon
Complete 5 Challenges
Restore 5 vestige outfit pieces
Complete 8 Side Missions
Perform 5 Eagle's Talon Takedowns
Earn all skills in one category
Find and open all the main game Conquistador treasure chests
Kill 5 enemies while they are searching for Lara
Kill 5 enemies with friendly fire
Defeat the Nahual
Hunt and kill 10 enemies while Perception is active
Kill 10 enemies while Focus is active
Takedown 10 enemies while Endurance is active
Pet 5 llamas
Collect 5 underwater Artifacts
Fully upgrade the knife
Collect 20 critters
Hunt and loot 5 rare animals
Rescue Hakan from the cultists
Retrieve Manko's Necklace
Craft special ammunition 50 times
Learn of 5 interesting locations from civilians
Shoot a turkey with a Flare Round
Get 3 pieces of equipment
Free Unuratu from prison
Find the mission of San Juan
Find the Silver Box of Ix Chel
Return to Paititi
Make an unlikely ally
Finish the main storyline
Complete Shadow of the Tomb Raider on Smart and Resourceful difficulty
Complete Shadow of the Tomb Raider on Rite of Passage difficulty
Complete Shadow of the Tomb Raider on One with the Jungle difficulty
Complete an Artifact Collection
Uncover 3 main game Crypts' secrets
Complete Shadow of the Tomb Raider on Deadly Obsession difficulty
Reach 100% completion
Complete the Two Graves Side Mission
Complete the Slayer's Gauntlet Challenge Tomb
Obtain a Bronze, Silver, or Gold medal in Time Attack for the Slayer's Gauntlet Challenge Tomb
Obtain a Bronze, Silver, or Gold medal in Score Attack for the Slayer's Gauntlet Challenge Tomb
Obtain Divine Bounty skill, equip Serpent Lash Godslayer weapon and Dragon Scales Legend outfit
Obtain a Bronze, Silver, or Gold medal in Time Attack for the Mother Protector Challenge Tomb
Obtain a Bronze, Silver, or Gold medal in Score Attack for the Mother Protector Challenge Tomb
Complete the Mother Protector Challenge Tomb
Complete the Eternal Reward Side Mission
Obtain Magic Touch Skill, equip Silver Strike Moonbeam weapon and Midnight Sentinel Farseer outfit
Complete all 7 downloadable content missions and receive the Tunic of the Shorn One
Complete The Wrathful God Side Mission
Complete the Zipacna's Craving Challenge Tomb
Obtain a Bronze, Silver, or Gold medal in Time Attack for the Zipacna's Craving Challenge Tomb
Obtain a Bronze, Silver, or Gold medal in Score Attack for the Zipacna's Craving Challenge Tomb
Obtain the Volcano Skill, equip Whispering Scourge Pandemic weapon and Reptile Hide Leviathan outfit
Obtain a Bronze, Silver, or Gold medal in Time Attack for the Forge of Destiny Challenge Tomb
Obtain the Grenadier Skill, equip the Umbrage 3-80 Shade weapon, and Brocken Shadow outfit
Complete the Forge of Destiny Challenge Tomb
Obtain a Bronze, Silver, or Gold medal in Score Attack for the Forge of Destiny Challenge Tomb
Complete the Echoes of the Past Side Mission and discover Abby’s ancient origins
Complete The Dragon and the Prince Side Mission
Complete The Sixth Seal Challenge Tomb
Obtain a Bronze, Silver, or Gold medal in Time Attack for the Sixth Seal Challenge Tomb
Obtain a Bronze, Silver, or Gold medal in Score Attack for the Sixth Seal Challenge Tomb
Obtain the Raptor's Eye skill, equip the Silent Sting Scorpion weapon and Hunter's Array Apex outfit
Complete The Age Makers Side Mission
Complete the Path of Huracan Challenge Tomb
Obtain a Bronze, Silver or Gold medal in Time Attack for the Path of Huracan Challenge Tomb
Obtain a Bronze, Silver or Gold medal in Score Attack for the Path of Huracan Challenge Tomb
Obtain A Thousand Eyes skill, equip elite versions of Oathtaker's Bow and Sinchi Chiqa Battle Dress
Complete the Path of Fear Side Mission
Complete the Howl of the Monkey Gods Challenge Tomb
Obtain a Bronze, Silver, or Gold medal in Time Attack for the Howl of the Monkey Gods Challenge Tomb
Obtain a Bronze, Silver or Gold medal in Score Attack for the Howl of the Monkey Gods Challenge Tomb
Obtain White Breath skill, equip Grip of Fear White Knuckle and Scales of Q Feathered Serpent