A friend pointed me to a Russian site called Independent Games Developers. I don't read Russian but here is the link

http://igdc.ru/

You can download all 5 entries with source code and everything here

http://igdc.ru/konkurses/defence2.rar

Here is a screen shot from Dan's entry. The five entries are mix of 2d and 3d work. Delphi source is available for all of them.