True believers have lost faith. Factions squabble. The enemies are not only massed at the gates of the kingdom, but they have also broken through.

This may sound like the back story for an epic trilogy. Instead, it’s the situation faced by the makers of Dungeons & Dragons, the venerable fantasy role-playing game many consider to be the grandfather of the video game industry. Gamers bicker over Dungeons & Dragons rules. Some have left childhood pursuits behind. And others have spurned an old-fashioned, tabletop fantasy role-playing game for shiny electronic competitors like World of Warcraft and the Elder Scrolls.

But there might yet be hope for Dungeons & Dragons, known as D&D. On Monday, Wizards of the Coast, the Hasbro subsidiary that owns the game, announced that a new edition is under development, the first overhaul of the rules since the contentious fourth edition was released in 2008. And Dungeons & Dragons’ designers are also planning to undertake an exceedingly rare effort for the gaming industry over the next few months: asking hundreds of thousands of fans to tell them how exactly they should reboot the franchise.

The game “is a unique entertainment experience because it’s crafted by the players at the table, and every gaming session is different,” said Liz Schuh, who directs publishing and licensing for Dungeons & Dragons. “We want to take that idea of the players crafting that experience to the next level and say: ‘Help us craft the rules. Help us craft how this game is played.’ ”