High Quality Content by WIKIPEDIA articles! Major and recurring characters from the fantasy series Diablo are listed below, organized by respective origin within the fictional universe. The story of the Diablo series revolves around events of the Great Conflict, a war between denizens of the Burning Hells and the High Heavens. Specifically, the games focus on events within the mortal plane, called Sanctuary, which are collectively known as the Sin War. The series began with Blizzard Entertainment`s 1996 video game Diablo and has been expanded with sequel Diablo II. The franchise has been further extended with a number of novels, most written by Richard A. Knaak.