Forgotten Realms: Demon Stone is a video game that was released in 2004 for PlayStation 2, Xbox and Windows PC. It is set in the Forgotten Realms campaign setting for Dungeons & Dragons (D&D), but the gameplay only vaguely models D&D's structure. The story was written by R.A. Salvatore and features the voices of Patrick Stewart as Khelben "Blackstaff" Arunsun and Michael Clarke Duncan as Ygorl. The hero of many of Salvatore's novels, Drizzt Do'Urden, makes an appearance in the game; he is a playable character during a portion of one battle.