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