Under rated God Sim
This was one of my favorite games growing up. You are God and you alter terrain. Sounds simple enough. There is one guy on an uneven terrain and you must flatten out the land for him in order for him to survive. He will build a hut and expand the kingdom. As long as your terrain is flat enough, he will eventually build up a castle/kingdom and more people will come from the houses and huts. Here is the really fun part. As you are doing this, the other side of the map is also being changed with other inhabitants. Those are your peoples enemies and they will fight each other. The more people you have, the stronger your forces will be. You can elect a person to be a knight and fight off their forces individually. Once your moral meter is raised high enough, you are able to cause earthquakes, floods, volcanoes. Overall, all you are really doing is altering terrain so your people will build a society for the sole purpose of global domination.