Just my two cents, but I've always utterly dismissed any material from any video game aside from "pure fluff", or areas where it doesn't have to interface in any practical way with the established context at large.
While visually satisfying, a video game's number one priority is balance, fun, and rule of cool. In the more narrative context of the established lore (and the more "nuts & bolts" environment of a pen and paper RPG), there's no (okay...not as much) trumping need to have everything simplified down to arbitrary ratings, which must also cancel one another out to ensure "fairness".