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.
Attended the meeting as Brother Cardoza
Finished the Original Game+
Killed the Outsider
Pushed an enemy to his demise using Void Strike
Had a guard salute you
Used Displace on a marker placed with Foresight and eliminated a target
Sent someone flying 40 meters using Hook Mines
Made 3 people vomit using a single bottle of Plagued Spirit
Shot a guard in the head with a fountain pen
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
Broke 4 Oraculum censers and listened to the prophecies
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
Collected all Eleuterio Cienfuegos paintings
Used Semblance to mimic Shan Yun and sing into the microphone
Stole the audiograph from the gallery without disabling the safeguard floor
Won the auction at Colibron Plaza
Took both bank vault keys
Dropped Ivan Jacobi through the trapdoor
Made an enemy explode into pieces using Displace
Finished a mission without killing anyone
Freed the assassin Daud
Listened to what swarms of rats have to say 5 times