Gamemaster

For example, in Powered by the Apocalypse systems, the other players assist the GM in creating both the NPCs and the details of the campaign setting.

[17] In typical play-by-mail games, players control armies or civilizations and mail their chosen actions to the GM.

The gamemaster also keeps track of non-player characters (NPCs) and random encounters, as well as of the general state of the game world.

[19] The game session (or "adventure") can be metaphorically described as a play, in which the players are the lead actors, and the GM provides the stage, the scenery, the basic plot on which the improvisational script is built, as well as all the bit parts and supporting characters.

[23] World of Warcraft has employees of Blizzard Entertainment that serve as gamemasters to help users with various problems in gameplay, chat, and other things like account and billing issues.

A gamemaster in this game will communicate with players through chat that has blue text and they will also have a special "GM" tag and Blizzard logo in front of their names.

[23] RuneScape has more than 500 moderators employed by Jagex to assist players and perform administrative duties in-game and on the site forums.

These Jagex Moderators, as they are called, usually have the word "Mod" and a gold crown preceding their account names which ordinary players are not permitted to use.

Miniconomy, a smaller text-based MMO, has a team of Federals, experienced players that help moderate the game and interactions.

The Zeus can also modify aspects of the world itself including time, weather, and wildlife to create dynamically progressing stories.

These include works such as Mythic Game Master Emulator, which employs an oracle system to allow players to play TTRPGs without a gamemaster.