 After leaving Steve Jackson Games, Johnson worked for White Wolf Publishing, where he designed gToons for the programmers at Cartoon Network.Prior to the introduction of gToons, the Cartoon Network's website, "Cartoon Orbit", had implemented a system of offering collectible digital trading cards (called cToons) and providing a means of trading them with other users of the website.Introduced in October 2002, "Cartoon Orbit's" gToons took the digital trading cards concept and made it into a game, using new gToons cards, where website users could play each other head-to-head.