Atlantaverse: Gaming in the Psychotronic World is a licensed Champions setting for the HERO 6th edition role-playing game. Full of all-new heroes, never-before-seen villains, multiple game scenarios, and over a dozen plot hooks it details the alternate universe called the Atlantaverse. It also has notes on building a long-lasting campaign.
You can use the book as a complete, ready-to-play setting for your players or take the elements you like for your own campaign.