OpenTTD is an open source simulation game based upon Transport Tycoon Deluxe

I used to play this a lot with a friend. We made a map called “German Reunification” which simulates the separation until 1989 and subsequent reunification. The map is made from real elevation data and city geocoordinates. https://wiki.openttd.org/en/Community/Scenarios/Real%20World...

That map idea is super cool, thanks for sharing!

This is awesome, but I don't understand the mechanism for simulating partition. Water comes flowing in slowly... Flowing from where? To where?