Dishonored: No Trace, episode 5: The Whaler's Revenge
I ruin Lady Boyle's masquerade ball with a bit of planning, a lot of luck, and a relatively small amount of unplanned crisis.
I tackle Kaldwin's Bridge in pursuit of the Royal Physician, Anton Sokolov—all the while attempting to leave no evidence of Corvo's involvement whatsoever.
Taking on Dishonored's High Overseer without leaving a trace is actually fairly straightforward.
Best of Watch Chris play through Dishonored trying to make every death look like a terrible, terrible accident.