The Open Adventure: Fantasy Core Rules set you up to play roleplaying games in fantasy worlds like those described in J.R.R. Tolkien’s The Lord of the Rings, Mercedes Lackey’s Valdemar books, Robert E. Howard’s Conan stories, or N.K. Jemisin’s Broken Earth trilogy. Everything you need, aside from some dice, pencils and paper, and a friend or two to play with, is included in this book.