Dishonored Definitive Edition

For the first two missions you just make sure you don’t get spotted by enemies, like usual. For the last mission, (Brigamore Manor) you need to first make sure you don’t get spotted. Then when you go to the void where Delilah is, you will need to wait for Daud to say “I’m running out of time”(while you wait you can go ahead and get the other painting) Then you switch the painting and a different cutscene will play. After this you should get the achievement when you reach the screen where it shows your stats.