This video game was very fun, and would make for an interesting role play. Assassins, rat plague, corruption, greed, religious conflicts and paranoia dominate the people of Dunwall City, the capital of an empire undergoing an industrial revolution that came with the discovery of whale oil. Corvo Attano, the protagonist and former bodyguard of the empress and her daughter Emily, is in the wrong place at the wrong time as the notorious, no-named guild of assassins murder the empress and kidnap her daughter. (Emily is at 0:27, a fraction of her kidnapping and mother's death right after that).
However, Corvo was used as a scapegoat by the two men that planned her death; a member of her government who takes her throne and the leader of the religious faction of the Empire. With the help of a group of men known as the Loyalist Conspiracy, and the supernatural being known as the Outsider, whom is the target of the empire's religious conflict, Corvo does what he must do to pull the empire out of the hellhole it's been tossed in.
Use this website if you have any questions: http://dishonored.wikia.com/wiki/Dishonored_Wiki