See http://www.spectrum.lovely.net/Chaos.html
Also see
http://en.wikipedia.org/wiki/Chaos_(video_game)This was followed by "Lords of Chaos" (1990) and then "Magic and Mayhem" (1998) we were then asked to do a follow up to this, somewhat confusingly called "Magic and Mayhem : The Art of Magic" (2001).
We were chosen because we had a proven 3D RTS engine. The result is still available to buy from Amazon!