Patricians & Plebians

From the introduction: Patricians & Plebeians is a rules-light role-playing game based on the Greek version of the board game Citadels and set in a medieval city fraught with corruption, intrigue and class warfare. Patricians and Plebeians are locked in an ever-continuing struggle for influence and wealth, both between themselves and against each other. They occasionally cooperate in the face of greater dangers… after which they promptly carry on with their backstabbing.