Dungeons & Dragons (D&D) is a fantasy role-playing game first published in 1974. As the popularity of the game grew throughout the late-1970s and 1980s, it became referenced in popular culture more frequently. The complement of games, films and cultural references based on Dungeons & Dragons or similar fantasies, characters, and adventures became ubiquitous after the end of the 1970s. Dungeons & Dragons, and tabletop role-playing games in general, have exerted a deep and persistent impact on the development of all types of video games, from "first-person shooters to real-time strategy games and massively multiplayer online games", which in turn play a significant and ongoing role in modern popular culture. In online culture, the term dungeon has since come to mean a virtual location where people can meet and collaborate. Hence, multi-user dungeons emerged throughout the 1970s and 1980s as a form of social networks or a social virtual reality. By creating a means for players to assemble and explore an imaginary world, the Dungeons & Dragons rules provided a transition from fantasy literary settings, such as those of author J. R. R. Tolkien, to fully virtual worlds. Public figures who play or have played Dungeons & Dragons include comedians Stephen Colbert and Chris Hardwick, musician Moby, and actors Vin Diesel, Matthew Lillard, Joe Manganiello, Mike Myers, Patton Oswalt, Wil Wheaton, and Robin Williams. Source: Wikipedia (en)