available under a Creative Commons Attribution license. Curtesy of MUSOPEN " Our mission is to set. Mega Casino Cities by UncivlEngineer. I've been playing around with what I'm calling " Casino Juggernaut Layouts", maps filled to the brim with Elegant Casinos. Everytime I tried to bring a Casino city to life, I failed when I put the Sci-Fi you create your city, go in the Casino submenu and click in " guide ".