Ville Takanen, one of the designers behind the Ironcore engine and Chthonian Highways, writes about making a science fiction (or science fantasy might be perhaps more accurate in this case) hack for Ironcore in his blog.
http://iithd.blogspot.fi/2015/12/wov-hacking-ironcore-1.html
More about the setting here:
http://iithd.blogspot.fi/2015/12/game-seed-whispers-of-void.html