 2nd edition is fully compatible with the fantasy RPG Seven Fortress Mobius (its 4th edition).The campaign settings of two games are able to be connected, both of "Far-the-Earth" and "Lars Felia", the world of Seven Fortress are ones of the worlds in the same multiverse named "Shuhakkai" (主八界, which means "main worlds of eight").Other six worlds in Shuhakkai