With OpenAI's ChatGPT Plus subscription, creating a custom GPT is surprisingly easy — no coding required! Start by going to settings and look for Custom GPT once you’re there.

You can use ChatGPT to be the dungeon master in your own bespoke role-playing game (RPG) and it can do a pretty good job of it. It's not perfect, but it's good enough to get a lot of fun out of.