The d100 family of roleplaying games has been missing a set of rules for science fiction scenarios and campaigns for a long time. M-Space does not only provide such rules, it offers an excellent toolbox for the science fiction genre. I especially liked the chapters on Extended Conflicts and on Circles (= various types of organizations), but all the other chapters are equally well presented and useful. Since most d100 games are more or less compatible, M-Space is a very good supplement not only for Mythras (=ex-RQ6), but also for the other members of the family, from BRP to Open Quest. Highly recommended.
[5 of 5 Stars!]