I don't know about the source (would be interested to know if anyone has more information) but the app was releases as part of a humble bundle along with other games and a voxel tech demo: http://blog.humblebundle.com/post/13163342831/introducing-th...
I love the stuff Introversion does.
Re:Procedural City Generation in Python
by ghostDancer on Monday September 28, 2015 @08:13AM
(#10290002)
From what i know , they released the source for Defcon , Darwinia/Multiwinia and Uplink with the bundle but the demos came without the source and only windows binaries unless they have released it in other place.
I believe the source was released somewhere, but I don't seem to be able to find it right now.