The Fantasy Ming Dynasty Secret Police Game.
The PCs are members of the Jinyi Wei, the Ming Emperor’s Brocade-Clad Guard, an elite group of agents dispersed throughout the empire to keep watch on the local governors and magistrates, uphold the proper Confucian order, and punish injustice wherever they may find it. They are granted near unlimited legal authority (although not always the tools or respect needed to turn that directly into results) and – barring the presence of a superior or a member of the Imperial Household – the absolute last word on matters of morality. Their actions, however, are constrained by a logic of efficiency and minimum disorder, and PCs who use unnecessary force or produce unnecessary disorder will quickly find the judgements of their superiors strict and harsh.
The campaign will be episodic, with PCs riding into a new town, city, or village every episode, detecting the presence of injustice and/or conspiracy and resolving it (experienced Jinyi Wei claim to be able to smell social disorder in the air). This injustice could range from the performance of unregistered marriages, to village family problems, to a group of governors plotting treason, to black sorcery and demon conjuring (in this strict Confucian worldview, the first two lead surprisingly quickly to the latter two).
System: Those of you who are deeply steeped in RPG-world will recognize that this is a resetting of Dogs in the Vineyard, which is quite a well written system, if a little too religious for me (I suppose it reveals something about me that I remove the moral authority of religion and replace it with the moral authority of an authoritarian state…). This game would use much of the system from Dogs, but with a few changes for setting.