Already available on PC and the Japanese XBLIG store, developer Petit Depotto has been readying their monster sim / fighter Unholy Heights for its stateside release. The delay is for good reason; nobody on the development team speaks English.
Never fear. Fresh translation work in hand, the game hits peer review shortly. Taking on the role of the Devil, you settle down to the life of being a landlord, renting out to a variety of monsters (because they need a place to live too). You’ll adjust prices, fix up the place, and battle human ‘heroes’ set on their eviction, leveling up your tenants in preparation for world domination. You’re the Devil, after all, what did you think you were doing this for? With the addictive elements of a management sim combined with Tower Defense, it could be quirky fun.
Unholy Heights will likely see release soon, and will run you $2.99 (based on other versions). If you want to follow the developer (in Japanese), you can do so here.