Turbine's game developers say D&D Online is designed to stay as true as possible to the paper-based version and offers a reasonable online alternative to the more than 4.6 million people still playing D&D just in the United States. The game -- in which players create imaginary characters and adventure through fantasy forests, castles and other environs -- has been around for more than three decades.

The company has built the online version specifically around the teams of fantasy adventurers that made the original D&D so popular. John Foster, Turbine's director of public relations, said D&D Online requires players to quickly find others with whom to join forces and set out to complete quests.