Dungeons & Dragons (abbreviated as D&D or DnD) is a fantasy role-playing game (RPG) originally designed by Gary Gygax and Dave Arneson, and first published in 1974 by Tactical Studies Rules, Inc. (TSR). The game is currently published by Wizards of the Coast, a subsidiary of Hasbro. It was derived from miniature wargames with a variation of the Chainmail game serving as the initial rule system. D&D's publication is widely regarded as the beginning of modern role-playing games and, by extension, the entire role-playing game industry.
As of 2006, Dungeons & Dragons remains the best-known and best-selling role-playing game, with an estimated 20 million people having played the game and more than US$1 billion in book and equipment sales. Dungeons & Dragons is known beyond the game for other D&D-branded products (such as the popular video games Neverwinter Nights and Baldur's Gate, as well as an animated TV series), references in popular culture and some of the controversies that have surrounded it, particularly a moral panic in the 1980s falsely linking it to Satanism and suicide.