Mythras (Hardback)Mythras Core rules Mythras is the acclaimed roleplaying game from The Design Mechanism. For those new to the game, Mythras is a straightforward, roll under percentile system. In Mythras your characters are defined by their culture, career, community, background, comrades, skills, magic and cults. Progression is through skill advancement not levels or similarly abstract concepts. As your characters adventure and quest, their capabilities improve and