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