Fletearth - The Sendbox Game

You are the God of Fletearth, you can create your world! Create seas, deserts, islands, woods, mountains, create peoples, but beware, different peoples will make war!
Create fluffy zombies that will hunt down your commoners. Unleash the power of the DRAGONS!
Let the commoners face the seasons, with rain and snow, day and night. Unleash earthquakes, hurricanes, meteorites, eruptions, black holes and acid rains.
Save your progress.
And if you are tired of dominating the upper world, build an access to the underworld and set out to explore procedural dungeons, where you have no powers and strange creatures will make your life difficult.