Gamemaster

One common feature of many RPGs is the role of gamemaster, a participant who has special duties to present the fictional setting, arbitrate the results of character actions, and maintain the narrative flow. In pen-and-paper and live action RPGs the GM performs these duties in person. In video RPGs many of the functions of a GM are fulfilled by the game engine, however some multi-player video RPGs also allow for a participant to take on a GM role through a visual interface called a GM toolkit, albeit with abilities limited by the available technology.