Flash Gordon RPG: Kingdoms of Mongo Limited Edition Hardcover (Savage Worlds) - Rules of Play says:

Kingdoms of Mongo is a comprehensive guide to the many diverse lands that can be found upon, above, and even within the great rogue planet of Mongo. This in-depth guide explores the cultures, geography, technology, and denizens of each domain. It contains everything your explorer need s to survive beyond the safety and security of Mingo City s thick klangstone walls and energized lightning fields. Kingdoms of Mongo focuses on nine individual kingdoms: Arboria, Coralia, Frigia, Kira, Radiuma, Sky City, Skyland, Tropica, and Valkr. It includes player-friendly information as well as secret material for the Game Master s eyes only, including new monsters, new adversaries, and all-new Savage Tales. Pack your bags, climb on your rocket cycle, and take to the turbulent skies! It s time to head out and see the whole wide world of Mongo for yourself!