Our old uDeadGame back from the grave as a free Git resource.
Here's the old version in our iGame3D engine for windows
http://udg.igame3d.com/files/uDeadGameWin.zip

Here's the old Mac version
http://udg.igame3d.com/files/uDeadGameMac.zip
It's 80% from where it was ten years ago.
Here's Tobi's Git currently with Unity 2017.3.1f.
Procedural buildings broke, so I'm thrashing some things out of the project.
https://github.com/thetobinator/udg2