Paragon Productions made their product 'Tara' open source and available to the public. Tara is a clone of Dome for the GFX9000 and is a start into creating games like Command and Conquer and/or Dune II. The source code and a short description can be found at the homepage of Tara.
Official site: http://www16.brinkster.com/cpubuilding/tara/tara.html
