The book presented a number of campaign models, which provided a framework for building a full campaign setting but did not include a full-scale setting. Campaign models that are or can be used in space opera include:
* Bughunters, an adventure game and bug hunt setting inspired by Aliens?, Starship Troopers, and its predecessor in Amazing Engine.
* Dimension X, an adventure game setting based on the concept of parallel universes, which are referred to as dimensions.
* Mecha Crusade?, an anime-inspired (primarily Gundam?-inspired) setting taking place in the 2050s that focuses on the war between Earth and the Colonists, with giant fighting robots (mecha) being used on both sides. It originally appeared as a mini-game in Polyhedron #154. Mecha Crusade uses a different system than the Guardians of Order-published d20 Mecha?.
* Star Law, a remake of the popular 1980s Star Frontiers space opera-based? role-playing game. The mini-setting is cited to use material from Star Frontiers? Alpha Dawn and Zebulon's Guide to Frontier Space.
Excerpt from Wikipedia.