The article "The Dolphins of Known Space: A new race for the Ringworld Game" appeared in Dragon Magazine issue 95. Ringworld Box Set The Ringworld role-playing game box set was titled "Larry Niven's Ringworld: Roleplaying Adventure Beneath the Great Arch", referring to the way the Ringworld looked from its interior surface. The authors are credited as Greg Stafford, John Hewitt, Sherman Kahn, Lynn Willis, Sandy Petersen, Rudy Kraft, Charlie Krank, Ed Gore, and Jeff Okamoto. It came in a box set with four books: the Explorer Book, Technology Book, Gamemasters Book, and Creatures Book, a sheet of cardboard miniatures, reference and character sheets, and a set of dice: 2d20 (actually dice with two sets of digits 0 to 9), 1d8, and 2d6. Explorer Book This book begins with a character sheet. It introduces role-playing games, then covers character creation, skill use, and combat. It presents a detailed history of humanity between the 20th and 29th centuries. It then describes eleven human worlds: Belt (the asteroid belt), Canyon, Down, Gummidgy, Home, Jinx, Margrave, Plateau, Silvereyes, "We Made It" and Wunderland. Finally, it gives rules for non-human, Kzin or Puppeteer, player characters, and a glossary. Gamemaster Book The Gamemaster Book begins with technical essays on the Ringworld, from physical construction, to life on the ring, with diagrams. There is a section on the "City Builders"—a Ringworld race that dominated the Ringworld, built floating cities, and sent spaceships to explore other worlds, until a mysterious technological virus destroyed their empire. Another section lists unanswered questions about the Ringworld. There are suggestions for creating scenarios and campaigns, and information on technology of various humanoid species of the Ringworld, and additional rules, including gravity, Credit Rating, and psionics. There is also an introductory scenario ("The Journey of the Catseye") intended to begin a Ringworld campaign. The characters are hired by Captain Gregor Lopez, famous explorer, for a journey to the Ringworld that does not go completely as planned. Technology Book The Technology Book gives rules and descriptions of the equipment employed by the explorers of the 29th century, categorized into generators, computers, medical equipment, tools, vehicles, weapons and defenses. Creature Book The Creature Book gives rules and descriptions for creatures, divided into Aliens, Humanoids, Animals and Plants. Many races get specialized hit location tables, characteristic maxima and minima, skills and traits. Ringworld Companion This supplement was published not long after the box set. The authors