A gamemaster is a person who acts as an organizer for a multiplayer role-playing game.
Gamemaster or Game Master may also refer to:
- Action Gamemaster, handheld multi-cartridge and CD-ROM clone console formerly in production by Active Enterprises, best known for Action 52
- Action Gamemaster, character from The Cheetahmen
- Gamemaster (board game series), board war game
- Game Masters (exhibition), exhibition at ACMI
- Captain N: The Game Master, joint-venture between American-Canadian animated television series
- Game Master (console), handheld game console
- Game Master Network, a YouTube detective series and franchise
- Konami Game Master, a game enhancer for the MSX home computer designed for Konami titles.
Gamesmaster may refer to:
- GamesMaster, a British television show that ran from 1992 to 1998, dedicated to video games, revived in 2021
- “The Gamesmaster”, an episode of season one of G.I.Joe : A Real American Hero
- GamesMaster (magazine), a spinoff of the above television show
- Gamesmaster (comics), a character in the Marvel Universe
- GamesMaster International, a magazine dedicated to roleplaying games
- “The Gamesmaster”, stage name for American professional wrestler Kevin Sullivan (1949–2024)