The Ringworld science fiction role-playing game was published by Chaosium in 1984, using the Basic Role-Playing system for its rules and Larry Niven's Ringworld novels as a setting.

The Ringworld Roleplaying Game describes it as an ocean planet dotted with island shield volcanoes.

* In the 1980s a role-playing game based on this setting was produced by Chaosium named The Ringworld Roleplaying Game.

" The article " The Dolphins of Known Space: A new race for the Ringworld Game " appeared in Dragon Magazine issue 95.

Other science fiction authors have devised their own variants of Niven's Ringworld, notably Iain M. Banks ' Culture Orbitals, best described as miniature Ringworlds, and the ring-shaped Halo structure of the video game Halo.

Given that spinning a Dyson Sphere would result in the atmosphere pooling around the equator, the Ringworld removes all the extraneous parts of the structure, leaving a spinning band landscaped on the sun-facing side, with the atmosphere and inhabitants kept in place through centrifugal force and 1000 mile high perimeter walls ( rim walls ).

It is one of the most visible influences of the Ringworld concept on popular culture.

Female Kzinti are not sapient, although among the archaic Kzinti found on the Ringworld some are.

* Outsiders: very advanced, fragile aliens shaped like cats o ' nine tails that, according to Ringworld, probably evolved on a cold, low gravity world resembling Nereid.

Likewise, every hominid species found on the Ringworld is descended from Pak breeders, and all are susceptible to the virus of Tree-of-life.

At one time found on every Thrint estate throughout the Thrintun empire, the only known survivors in Known Space are on the planet Jinx, though they are later found on the Ringworld and on a forested planet called Beanstalk ( in the Man-Kzin Wars story " Hey Diddle Diddle ").

Some Martians still exist on the " Map of Mars " on the Ringworld.

This becomes a problem with disks that are a significant distance apart on the Ringworld surface, as they will have different velocities: same speed, different direction.

Some of these Martians are thought to have survived on the Ringworld, however.

The severely damaged vessel collides with a strand of shadow-square wire and crash-lands on the Ringworld near a huge mountain.

Her spaceship was stranded on the Ringworld when the landing mechanism failed.

Based on his studies of an ancient Ringworld map, Louis devises a plan to escape.

Along the way, Teela and Seeker choose to remain behind, to inhabit a flying castle and remain on Ringworld.

The massive mountain does not appear on a map of the original Ringworld, leading Louis to conclude that it is in fact the result of a meteor impact with the underside of the ring, which pushed the " mountain " up from the ring floor and broke through.

Because the Ringworld spins fast enough to provide gravity, once the police station and ship are on the underside, centrifugal force pushes them outward from the ring into open space.

Most Ringworld societies have forgotten they live on an artificial structure, and now attribute the phenomena of their world to divine power.

* Tsunami Games released two adventure games based on Ringworld ; Ringworld: Revenge of the Patriarch was released in 1992 and Return to Ringworld in 1994.

Similarities to Ringworld have been noted in the game, and Niven was asked ( but declined ) to write the first novel based on the series.

The Ringworld series is set in the Known Space universe.

The fictional universe is also the home of species from outside Known Space, including the hominid inhabitants of a megastructure called Ringworld.

The Ringworld orbits a sun outside Known Space, but it is a well-established artifact within the Known Space " universe ".

The stories that constitute the Known Space series were originally conceived as two separate series: the Belter stories, featuring solar-system colonization and slower-than-light travel with fusion-powered and Bussard ramjet ships, and the Neutron Star / Ringworld series of stories, set much further into the future, which feature faster-than-light ships using " hyperdrive ".

In the Known Space stories, Niven had created a number of technological devices ( GP hull, stasis field, Ringworld material ) which, combined with the " Teela Brown gene ", made it very difficult to construct engaging stories beyond a certain date — the combination of factors made it tricky to produce any kind of creditable threat / problem without complex contrivances.

Ringworld is a 1970 science fiction novel by Larry Niven, set in his Known Space universe and considered a classic of science fiction literature.

* The Incompleat Known Space Concordance — Appendix: The Ringworld

* Encyclopedia of Known Space: Ringworld

The game is intended to be set on the Ringworld itself, an enormous single world discovered at the far reaches of Known Space, a ring around a sun at approximately the orbit of the Earth.

The players initially play explorers from Known Space, sent as scouts to the Ringworld.

Instead, the game and rules focused on parties of characters exploring the Ringworld itself, and, despite its vast size ( with a surface area larger than that of all of Known Space's inhabited planets put together ), many who bought the game felt limited by this one world setting.

Ringworld's Children is a 2004 science fiction novel by Larry Niven, the fourth in the Ringworld series set in the Known Space universe.

All the intelligent species of Known Space are interested in the Ringworld.

A number of previously revealed " facts " turn out to have been lies told by characters in the books, which is another common feature of Niven's Ringworld and other Known Space stories, especially those involving Protectors and Puppeteers.

According to the story in Ringworld ( expanded in the Known Space novel Juggler of Worlds ), the Puppeteers intervened with human reproduction beginning several generations in the past, with the intention of breeding humans for luck.

The Hot Needle of Inquiry which carried Chmeee, Louis Wu, and the Hindmost from Known Space to the Ringworld in The Ringworld Engineers also had a # 3 hull.

A # 4 GP hull is a transparent sphere around in diameter ; it is the largest ship size ever built in Known Space ( though Ringworld 1 refers to some STL " slowboat " colony ships as being larger and Louis Wu's internal monologue indicates the ship is more than a mile in diameter ).

There is some information on spaceships ( Human and City Builder ), hyperspace, a map of Human Space, and statistics for vehicles used on the Ringworld.

There have been many other wheel-shaped space habitats in science fiction, such as the Ringworld or the Earth-orbiting Space Station V invented by Arthur C. Clarke and Stanley Kubrick and depicted in Kubrick's 1968 movie 2001: A Space Odyssey.