Dungeons & Dragons (abbreviated as D&D or DnD) is a fantasy role-playing game created by Gary Gygax and Dave Arneson, first published in January 1974 by Tactical Studies Rules (TSR), a company founded by Gygax later transformed into TSR Hobbies la which was acquired in 1997 by Wizards of the Coast, along with all rights to D&D; two years later, Wizards itself was bought by Hasbro. Partly thanks to intense marketing, Dungeons & Dragons branded products accounted for over 50% of the RPG market sold in 2002