Okay, tell me if this is as cool an idea as I think it is: SimKingdoms, or some name like that. You choose an area and an era, like Ancient Egypt, Ancient Asia, Medieval Europe, Wild West, or Ancient Greece. You sculpt the terrain, add forests and odd animals. Then you create a ruler of some kind, give him/her a title, and have him/her hire people to follow blueprints you dictate to build a medieval castle, or a roman palace, some strange combination of the two, or whichever. You could nicely rebuke the slacking builder or punish him for his sloth. You manipulate the world as the king, god, and populace by turns. It's a lot like Simcity, but in every era and every place, and you can play nearly everyone in it.