This particular campaign takes place outside the realm of the normal Champions campaign. The setting is an medieval period on a alien world in an alternate dimension. The hero's face a world that is populated by a myriad number of creatures ranging from friendly Gnomes to evil and destructive Dragons. Science as of this point is an undiscovered art and magic and superstition rule the minds and lives of the inhabitants of this world.
You may go here to find the Campaign Rules for this campaign.