Sintopia, a hell city-builder/management game x evil god game hybrid (with an independent overworld where you can cast spells), releases demo on Steam

If this concept sounds even remotely appealing and you have free time, I would recommend checking out this let's play:

I Transformed Hell Into A PROFIT MACHINE in this Sin Factory Tycoon! by Orbital Potato

You get a feel for how unique the Sintopia concept is.