Hellboy

Mike Mignola's Hellboy is about a demon child summoned to Earth as its destructor. Instead, adopted by an expert in the occult, he grows up to be an occult investigator and general protector of the human race.

In addition to spinning off several additional comic book series, Hellboy has had two major motion picture adaptations, directed by Guillermo del Toro, and an RPG adaptation published by Steve Jackson Games.