
The Game Design Round Table Season: RPG - GM as Designer with Justin Alexander
Aug 19, 2025
Justin Alexander, a veteran RPG designer and author, shares his extensive knowledge on the role of Game Masters as designers. He discusses the importance of connecting narrative ideas to game mechanics, which enhances the overall RPG experience. Justin also addresses the challenges faced by new GMs and provides valuable insights into onboarding players through innovative game designs like Magical Kitty. He emphasizes the need for explicit guidance to avoid common GM mistakes and how effective communication can bridge the gap between published materials and actual gameplay.
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Start With Vision, Then Mechanics
- Define a clear vision of play before designing mechanics so mechanics purposefully support play.
- Mechanics without a vision become floating rules that don't guide table behavior.
Match Mechanics To Play Loop
- Design mechanics to directly support the game's loop and activities (e.g., downtime, jobs, crew).
- Map each mechanic to a specific part of the intended play cycle so it produces predictable experiences.
Give Groups Adjustable Dials
- Include adjustable dials in setting or structure so groups can tune player-vs-player tension.
- Specify constraints (e.g., secrets shouldn't directly oppose group goals) to avoid negative play.






