For the time being, Magic Skull Games has its sights squarely set on providing Pathfinder RPG material, though there are some fiendishly cool ideas for other stuff cooking up in the MSG cauldron of goodies.
MSG’s current Pathfinder compatible product is the Grimoire Viperian, a supplemental book chock full of cool stuff like new base classes, prestige classes, new Eldritch Path feats, supernatural Signs of Good and Evil, spells, magic items, and monster templates, many with a seriously serpentine flavor.
What can I say other than, “Mwahahahahaha!”
Learn more about the Pathfinder Roleplaying Game at paizo.com.
Pathfinder is a registered trademark of Paizo Publishing, LLC, and the Pathfinder Roleplaying Game and the Pathfinder Roleplaying Game Compatibility Logo are trademarks of Paizo Publishing, LLC, and are used under the Pathfinder Roleplaying Game Compatibility License. See http://paizo.com/pathfinderRPG/compatibility for more information on the compatibility license.