An AI dungeon master, available at 2am on a Tuesday
The hardest part of a tabletop campaign is getting five people in a room. MythSmith runs the table for one.
What the AI game master does
It does the job a human GM does: sets the scene, plays every character who is not you, decides what your attempt actually accomplishes, and keeps the plot moving when you stall.
What it does not do is hand you three options. You say what you are doing — talking your way past the gate, going over the wall, or going home and coming back with a better idea — and it narrates the result. An AI dungeon master has no encounter table it is trying to get you to, so there is no wrong direction to walk in.
It remembers the last session
A GM whose world resets every time you sit down is not really running a campaign. Story memory keeps the thread: who owes you, what you swore, which town you are no longer welcome in.
Where a fact must never drift, story cards pin it — the name of your sword, the rules of the local magic, the exact reason the duke hates you. The storyteller reads them every turn, so long campaigns stay consistent instead of slowly rewriting themselves.
Solo play, on your schedule
A session can be four hours or four minutes. Nothing is waiting on anyone else, nothing needs rescheduling, and the campaign is exactly where you left it when you come back — on the web, or in the app on the train.
It is also a low-stakes place to test an idea before you bring it to a real table: run the dungeon once, see where it sags, and find out which NPC turns out to be the interesting one.
What you get
Plays every NPC
Each with their own read on you, carried forward between scenes.
No prep
Open with a scenario or two lines of your own; the map and cast get filled in.
Rules out of the way
Outcomes are narrated rather than rolled, so play never stops to look something up.
Campaign-length memory
Sessions connect. Last month’s choice can be this month’s problem.
Story cards
Pin the canon you refuse to let the storyteller forget.
Always available
No scheduling, no cancellations, no half a party showing up.
Questions, answered.
Does the AI dungeon master use D&D rules?
No. MythSmith narrates outcomes rather than resolving them against a specific rule set, so there is no character sheet to fill in and no stat block to look up. If you want a world that runs on a particular set of rules, describe them in a story card and the storyteller will play to them.
Can I use it to prep for a real tabletop game?
Plenty of people do. Running a scenario solo first is a fast way to find the flat scenes, test an NPC voice, or generate a town with more detail than you had time to write.
Will it just let me win everything?
No. Attempts can fail, and the world pushes back — an AI GM that says yes to everything produces a story with no tension in it, which is the fastest way to get bored.
How much does it cost?
Nothing to play. Paid plans widen the context window and story memory for very long campaigns and add credits for scene art.