Dishonored: the Phantom of Dunwall

Dunwall, the capital of the Empire of the Isles, is a city on the verge of collapse. The streets crawl with rats and the poor souls ravaged by the plague, while the rich and powerful play their games of deception from the comfort of their gilded manors.
But the death of the Empress is about to unleash a new kind of monster onto the streets. One who will stop at nothing to reach her goals.

Revenge solves everything.