Gamma World is a science fantasy role-playing game, originally designed by James M. Ward and Gary Jaquet, and first published by TSR in 1978. It borrowed heavily from Ward's earlier game, Metamorphosis Alpha.
The d20 System is a role-playing game system published in 2000 by Wizards of the Coast, originally developed for the third edition of Dungeons & Dragons. The system is named after the 20-sided dice which are central to the core mechanics of many actions in the game.
Open gaming is a movement within the tabletop role-playing game (RPG) industry with superficial similarities to the open source software movement. The key aspect is that copyright holders license their works under public copyright licenses that permit others to make copies or create derivative works of the game.
A campaign setting is usually a fictional world which serves as a setting for a role-playing game or wargame campaign. A campaign is a series of individual adventures, and a campaign setting is the world in which such adventures and campaigns take place. Usually a campaign setting is designed for a specific game or a specific genre of game. There are numerous campaign settings available both in print and online. In addition to published campaign settings available for purchase, many game masters create their own settings, often referred to as "homebrew" settings or worlds.
Mutants & Masterminds is a superhero role-playing game written by Steve Kenson and published by Green Ronin Publishing based on a variant of the d20 System by Wizards of the Coast. The game system is designed to allow players to create virtually any type of hero or villain desired.
Dream Pod 9 (DP9), formerly Ianus Games, is a Montreal-based Canadian game publisher. Its most notable products are Heavy Gear, Jovian Chronicles, Tribe 8, and Gear Krieg, as well as the Silhouette role-playing game system.
The Open Game License (OGL) is a public copyright license by Wizards of the Coast that may be used by tabletop role-playing game developers to grant permission to modify, copy, and redistribute some of the content designed for their games, notably game mechanics. However, they must share-alike copies and derivative works.
Palladium Books is a publisher of role-playing games (RPGs) perhaps best known for its popular, expansive Rifts series (1990–present). Palladium was founded April 1981 in Detroit, Michigan by current president and lead game designer Kevin Siembieda, and is now based in Westland, Michigan. The company enjoys the support of a small but dedicated fanbase who praise its various game series for their innovative settings and ease of adaptability to various personal preferences, play styles, and power levels.
Target Games was a Swedish publisher of role-playing games active from 1980 until the year 1999 when they went into bankruptcy proceedings. Until the mid-1990s they published their Swedish roleplaying games under the brand name Äventyrsspel.
In the open gaming movement, a System Reference Document (SRD) is a reference for a role-playing game's mechanics licensed under the Open Game License (OGL) to allow other publishers to make material compatible with that game.
Teenage Mutant Ninja Turtles & Other Strangeness is a role-playing game based on the comic book created by Kevin Eastman and Peter Laird. The core rulebook was first published by Palladium Books in September 1985 – a couple years before the Turtles franchise achieved mass popularity – and featured original comic strips and illustrations by Eastman and Laird. The rules and gameplay are based on Palladium's Megaversal system. Some of these rules, outlining the basics of character creation and providing a short list of animal options, were later incorporated in the second edition of Heroes Unlimited.
Mutant is a series of Swedish role-playing games that were developed and published by Äventyrsspel. The current version is developed by Fria Ligan under license by Cabinet Entertainment and published in Swedish and English by Fria Ligan and Modiphius respectively. A video game adaptation named Mutant Year Zero: Road to Eden was released December 2018.
Mongoose Publishing is a British manufacturer of role-playing games, miniatures, and card games, publishing material since 2001. Its licenses include products based on the science fiction properties Traveller, Judge Dredd, and Paranoia, as well as fantasy titles.
Fallout: A Post Nuclear Role Playing Game, most commonly known as Fallout or Fallout 1, is a turn-based role-playing video game developed and published by Interplay Productions in 1997. The game has a post-apocalyptic and chiefly retro-futuristic setting, taking place in the mid-22nd century decades after a global nuclear war. The protagonist of Fallout is an inhabitant of a Vault, part of a network of long-term nuclear shelters, who is forced to venture out into the wastes to find a replacement part to fix their Vault's failing water supply system and save their fellow Vault dwellers.
Dawning Star is a science fiction role-playing game by Blue Devil Games built on d20 Modern and powered by d20 Future by Wizards of the Coast. It is the first full-scale campaign setting using the d20 Future ruleset. It is published under the Open Game License.
Pacesetter Ltd was a game company based in Delavan, Wisconsin, founded in 1984. Company founders included CEO John Rickets, and Mark Acres, Andria Hayday, Gaye Goldsberry O'Keefe, Gali Sanchez, Garry Spiegle, Carl Smith, Stephen D. Sullivan and Michael Williams. Pacesetter produced both tabletop role-playing games and board games.
Exodus is a post-apocalyptic role-playing game published by Glutton Creeper Games using the d20/OGL system. Originally the game was licensed in the Fallout universe, but due to legal complications with Interplay and Bethesda Softworks, Fallout's current copyright holder, the publisher decided to continue working on the game, retaining most of its elements and excluding all references to Fallout.
Labyrinth Lord (LL) is a fantasy role-playing game written and edited by Daniel Proctor and published by Goblinoid Games. It emulates the rules and feel of Dungeons & Dragons (D&D) using the Open Game License (OGL) from Wizards of the Coast. LL is based on the 1981 D&D Basic Set edited by Tom Moldvay, and its accompanying Expert Set by David "Zeb" Cook.
Dungeons & Dragons retro-clones are fantasy role-playing games that seek to emulate earlier editions of Dungeons & Dragons (D&D) no longer supported by Wizards of the Coast. They are mostly made possible by the terms of the Open Game License and System Reference Document, which allows the use of much of the proprietary terminology of D&D that might otherwise collectively constitute copyright infringement. While these rules lack the name D&D or any of the associated trademarks, their intent is to have a playable experience similar to those older editions.
