Banestorm the current campaign name for the Yrth setting first presented in Man to Man as the world that Castle Defiant was located on. It was detailed in Fantasy 1st edition, expanded on in various adventure Supplements like Tredroy and Harkwood, then recompiled in the 1991 book Fantasy 2nd edition. With a couple of exceptions, no Yrth related materials were published after this until after the release of GURPS 4th Edition. The "Fantasy" book title was used in 4th edition as a tool kit source for GMs to build fantasy settings and the Yrth setting was released under the more marketable name of Banestorm.