Hi, I'm working on a personal GB project that I've chosen to entitle Ghostbusters d20. Basically it uses the d20 System by Wizards of the Coast, to create a new independent Ghostbusters RPG for public domain. I'm planning on using the material WOTC has termed Open Game Content which can be used by anyone as the basis for my game. It will require the D&D Player's Handbook, DM's Guide, and Monster Manual to play, however.
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Still, I'm going to spend a year researching this to see if it's feasible and if it is, I will publish it for free on my Crosswinds account. Any fans of D&D and/or GB who are interested please feel free to email me or post on this thread with your questions, suggestions, rants, or encouragement. That's all for now folks. ^_^