Down with the Duke

Down with the Duke is an achievement/trophy in Dishonored 2.

How to Acquire
Either kill or eliminate non-lethally Duke Luca Abele during the mission The Grand Palace. Completing either objective unlocks the achievement.

To non-lethally eliminate the Duke, Emily Kaldwin or Corvo Attano must identify and talk to his body double, Armando. Armando will instruct the protagonist on how to go about making it seem like he is the real Duke, and Luca the impostor. Once the deception has been carried off, the achievement unlocks. Долой герцога!