I owned the Guardians of Order version for a while, but it became clear after a while that it was not complete. It lacked several important cult rituals, several rules clarifications, and some background stuff... I was shocked to learn that the original version assumed the PCs were outlaws, working outside a stratified and baroque society, when the GoO version clearly spends a lot of time detailing the culture, and a brief paragraph on the horrible, short, and doomed life of an outsider. Seemingly, a lot of fun could be had from shattering social expectations as with a hammer, but the core rules supposed not only very social characters, but a number of traits considered important that would become meaningless the moment you stepped outside the law.
I'm tempted to find some older versions of the setting, maybe adapt them to GURPS, Fantasy Craft, or something.