I noticed that DriveThruRPG has posted a scanned PDF copy of Tarantis*, the third of the city-states published by Judges Guild. I have fond memories of purchasing it 'back in the day'. I eagerly ripped off the plastic and geekily lusted over those wonderful yellowish city maps. I also seem to remember really liking it, but honestly none of the details of exactly why. It was a LONG time ago afterall. I may have to download it and give it a read.
They also have the revised City State of the Invincible Overlord, but oddly I do not see City State of the World Emperor.
*I also noticed that cut and paste is disabled in the PDF...caveat emptor.