An alltime classic game for the Commodore 64 and the Commodore Amiga by Andrew Braybrook. There was also a "Paradroid 90" version with advanced graphics. A free clone for Linux PCs is Freedroid.
- http://homepages.tesco.net/~parsonsp/html/paradroid.html
- http://www.paradroid.ovine.net/
- http://paradroid.sourceforge.net/