Lots of games talk about how you can approach missions from any angle or use any strategy including the legendary "no kill" playthrough option. Most of the time, however, it's just not true. Sure, it's technically true, but usually one method is just easier. As soon as you realize that, you stop using other methods.
Dishonored seeks to become another one of those games. It has one thing going for it that others maybe don't, and that's Dishonored's supernatural abilities. Several outside the box examples of how to use Dishonored's supernatural powers are mentioned during this new dev doc, called Experience.