Is a fully skill based system. No classes, no levels, just skills. Mythus is truly a quantum leap in fantasy role-playing. No other game system is nearly as well though out or as complete as Mythus. As for complexity, it can be as simple or as complex as you so desire.
Persona creation is complex, but game-play mechanics are very simple based on percentages.
Mythus, Mythus Magick, Journeys Magazine, Dangerous Journeys and all related game terminology are presumably trademarked by TSR Incorporated 1994.