Openblack is a an attempt to recreate lost god game Black & White in a modern, open source game engine
Black & White was a god game that frustrated more often than it delighted, but which was nevertheless delivered with enough verve and ambition to be worth playing. It's a crying shame that it's not currently available to buy anywhere digitally, presumably because the rights are soaked in a gutter between EA (the original publisher) and Microsoft (who bought and closed developers Lionhead).
If you do still own a physical copy of Black & White however, you might be interested in Openblack. It's a fan-led project to create a modern, open source engine for running Black & White, and its first build was just released yesterday.