User Summary Mega d30 is an adaptation to the D30 system of the Mega RPG and supplement Mega IV directly as an alternative ruleset. You'll find the rules for Mega specific powers. D30 is a RPG system meant to be generic by adding modules to a robust core mechanic. As its name indicate, it primarily uses a D30 (30 sided dice). Système modulaire D30 is self published and released under Creative Commons license by-nc-sa fr 2.0. Currently only available in French.