Just now beat the game, after Campbell's mission I played through without killing people and reloading when I did. Amazing game, a bit of a confusing ending. Not the ending cinematic, but the actual last part of the last mission.
MAD SPOILERS, YO
READ IF YOU DARE
I HATH WARNED THEE
So I got to Havelock with Martin and Pendleton dead for an unexplained reason while he talked to him, I assume he lost his shit and poisoned or shot them, then I knocked him out, read Havelock's journal that strongly implied Corvo was Emily's dad, opened Emily's door, she goes "Does this mean i'm empress?" or something and boom, level's over, leaving me going "Wat". Dishonored is in my top 5 list of games, but shit, that ending was pretty damn rushed. I was hoping for a fight as amazing as the one with Daud, but I can't really see that happening and still having a way to let Havelock live.
Wuteva though, crazy awesome game.