Here is the full list of all 97 Divinity: Original Sin 2 achievements. It takes around 200 hours to unlock all of the achievements on Windows.
Share Divinity with The Doctor
Make a deal with Adramahlihk
Submit to the God King
Purge Rivellon of all Source
Share Source with all of Rivellon
Complete the game in Explorer Mode
Complete the game in Classic Mode
Ascend to Divinity
Defeated the Kraken
Lohse: Banish your demon
Defeat Adramahlihk
Beast: Ally with the Queen
Beast: Assassinate the Queen
Gain entrance to Lucian's Crypt without following the Path of Blood
Successfully walk the Path of Blood
Persuade Toyseller Sanders to give you his amulet
Rescue Arhu
The Red Prince: Kill the Red Princess
The Red Prince: Become the father of dragons
Obtain Anathema
Discover Reimond's Lair
Enter the Academy
Enter The Arena of the One
Pray at every altar on the Nameless Isle
Convince Alexandar to ally with you
Convince all party members to let you ascend
Discover the hidden entrance to the Academy
Arrive at Arx
Sebille: Serve the Mother Tree
Sebille: Destroy the Mother Tree
Sebille: Kill the Master
Arrive at the Nameless Isle
Set Gareth on a path of vengeance
Awaken the corrupted Ancestor Tree on Bloodmoon Island
Learn of the Council of Seven's location from The Advocate
Escort Saheila outside without fighting the Lone Wolves
Learn of the Council of Seven's location from a higher power
Unlock your third Source Point slot
Become champion of the Driftwood Arena
Lockpick your way into Mordus' hidden lair
Unlock your second Source Point slot
Kill Andras, the necromantic dog
Adopt Peeper
Speak to an animal's spirit
Set Gareth on a path of reconciliation
Perform successful surgery on Natalie
Craft a grenade
Receive Dorotya's kiss
Meet Meistr Siva
Help free Mari from the Voidwoken
Arrive at Reaper's Coast
Enter the Hall of Echoes
Take command of the Lady Vengeance
Welcome Tarquin to the Seekers' service
Shapeshift into every race
Equip runes to all of an item's available slots
Craft a skill
Defeat Alexandar in Fort Joy
Craft a scroll
Kill Slane
Kill Radeka
Rescue Gareth from Braccus' Armoury
Become champion of the Fort Joy arena
Kill an enemy using Teleportation
Use your first Source Skill
Face a higher power
Remove your Source Collar
Arrive at the Sanctuary of Amadia
Escort the Black Cat out of Fort Joy
Flee Fort Joy for good
Gain the Hero tag
Escape the kraken's clutches
Arrive at Reaper's Eye
Win a persuasion event
Perform a successful theft
Force Dallis to retreat from combat in Fort Joy
Escape Dallis' siege on the Lady Vengeance without killing every minion
Escape Dallis' siege on the Lady Vengeance after killing every minion
Learn of the Council of Seven's location from Malady
Correctly answer all of Crispin's questions
Take the ferry to Bloodmoon Island
Tame Featherfall
Destroy every Voidwoken egg in Reaper's Cove
Serve Garvan the tainted stew
Swear to the Covenant
Lohse: Embrace your demon
Fane: Return the Eternals to Rivellon
Fane: Embrace this strange new world
Ifan: Kill Lucian
Ifan: Forgive Lucian
Complete the game in Tactician Mode
Use the Curse skill
Gain the Villain tag
Get caught breaking the law
Successfully begin a match in Arena Mode
Successfully begin a Game Master session
Complete the game in Honour Mode