A few years ago I wrote a blog post titled “D&D & IP” in which I discussed the Open Gaming License that allows (allowed?) anyone to use elements of Dungeons & Dragons, for free, to create their own products. To recap: WotC wants to encourage D&D enthusiasts to create and sell products that fit within the game – within certain limits. Those limits are defined by WotC’s Open Gaming License (“OGL”). This link directs you to the most recent version of the OGL. If you want to create and sell content within the D&D universe, you must obey those rules….