Full list of all 30 Dishonored: Death of the Outsider achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Finished the Original Game+
Killed the Outsider
Stole the audiograph from the gallery without disabling the safeguard floor
Finished the game without being detected
Returned the Outsider to the mortal world
Destroyed an Envisioned cultist
Touched the Eye of the Dead God
Completed all contracts
Recovered the stolen archive
Attended the meeting as Brother Cardoza
Broke 4 Oraculum censers and listened to the prophecies
Collected all Eleuterio Cienfuegos paintings
Pushed an enemy to his demise using Void Strike
Emptied the vault without tampering with any security systems, leaving everyone unharmed and asleep
Obtained an ancient weapon
Opened every safe inside the main vault
Sent the vault crashing through the floor
Won the auction at Colibron Plaza
Had a guard salute you
Sent someone flying 40 meters using Hook Mines
Shot a guard in the head with a fountain pen
Used Displace on a marker placed with Foresight and eliminated a target
Made an enemy explode into pieces using Displace
Took both bank vault keys
Used Semblance to mimic Shan Yun and sing into the microphone
Made 3 people vomit using a single bottle of Plagued Spirit
Dropped Ivan Jacobi through the trapdoor
Listened to what swarms of rats have to say 5 times
Finished a mission without killing anyone
Freed the assassin Daud