In the Dungeons & Dragons (D&D) role-playing game, the Dungeon Master (often abbreviated as DM) is the game organizer and participant in charge of creating the details and challenges of a given adventure, while maintaining a realistic continuity of events. In effect, the Dungeon Master controls all aspects of the game, except for the actions of the player characters (PCs), and describes to the players what they see and hear.

The title was invented for the TSR Dungeons & Dragons RPG, and was introduced in the second supplement to the game rules (Blackmoor). To avoid infringement of TSR's trademarks, and to describe referees in role-playing genres other than sword and sorcery, other gaming companies use more generic, terms, like Game Master, Game Operations Director, Judge, Referee or Storyteller, with some using more esoteric titles related to the genre or style of the game, such as Keeper of Arcane Lore, or even completely surreal titles such as Hollyhock God.

Also, in Faiths and Pantheons, the Faerunian Overgod Ao answers to a superior entity, insinuated to be the "Dungeon Master".

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Guardic (ガーディック, Gādikku) is a shoot 'em up video game for the MSX computer. It was created and developed by Satoshi "Pac" Fujishima while working for Compile, the creators of other shoot 'em up games such as Zanac, The Guardian Legend, and Blazing Lazers.

Guardic is unique in that the player can choose stages, which are connected by a maze. Each stage is a non-scrollable single screen and has 1 to 3 groups of different enemies. The player can "buy" ship power-ups like speed, weaponry, and special powers before each stage—a departure from the traditional scrolling-shooter power-up system. In the end of each stage, the ship could safely fly through a scrollable maze to another stage.

Guardic is the second title in a MSX trilogy by Fujishima, which started with Final Justice (1985) and ended with Blaster Burn (1990). In this last installment the player commands Guardic II as its main weapon against Gose, an invasion army from outer space. It also inspired the sequel, and cult classic NES shooter, The Guardian Legend (known as Guardic Gaiden in Japan).

In August 2011 D4 Enterprise released an emulated version for iOS devices.

Gyrodine (ジャイロダイン, Jairodain) is a top-down vertical helicopter scrolling shooter for the Nintendo Entertainment System/Family Computer, MSX and arcade developed by Crux and published by Taito in 1984.