Solo Tabletop RPG

Solo Tabletop RPG: Play Alone, Roll in the Open

Sit down alone, say what your character does, and the game master calls the check out loud — then the room answers in a named character's voice.

Harry Potter · Hermione Granger at the grey door in the Charms corridor, wand lit, the Marauder's Map on the flagstones

Demon Slayer · Shinobu Kocho behind the inn ledger, one finger on the eleventh name, snow past the door

Horimiya · Hori Kyouko standing over the campaign map in the clubroom, one palm flat on the last room, a d20 between you

Harry Potter · Draco Malfoy at the catalogue desk in the Restricted Section, hand flat on an open book

Demon Slayer · Kyojuro Rengoku in the dining car, a bone-white d20 between the dinner boxes

Harry Potter · Hermione Granger kneeling at the eleventh door, wand tip dark, the Map open on the floor — **Harry Potter · The Eleventh Door** — Hermione has the Map open and the door is not on it. The opening check is already on the table: d20 + Wandwork +4 against DC 15.

Demon Slayer · Shinobu Kocho at the Yukiakari Inn ledger with the eleventh name wet on the page — **Demon Slayer · The Eleventh Name** — Eleven names, ten rooms, ten guests. Shinobu asks which one of you is the extra — d20 + Sense +3 against DC 13.

Horimiya · Hori Kyouko leaning over a hand-drawn tower map in the clubroom, a d20 on the last room between you — **Horimiya · The Last Move** — The campaign binder is gone, the last room is a sixteen, and Hori will not roll it for you. Two years of Thursdays come down to this table.

Demon Slayer · Giyu Tomioka on a cedar road at night, two mile stones both cut with eight, the lantern leaning toward the second — **Demon Slayer · One More Mile** — Two markers, both cut eight. Giyu tells you not to read the next stone aloud. Roll d20 + Nerve +2 against DC 13.

Harry Potter · Draco Malfoy at the catalogue desk in the Restricted Section, one hand flat on the open page — **Harry Potter · The Wet Margin** — Draco's hand is flat on a page that is not in the catalogue, and the margin note is still wet. Shut the door or go back upstairs.

Horimiya · Miyamura Izumi in the school library after closing, a withdrawn textbook open to pencil notes and a d20 showing four — **Horimiya · The Margin** — A withdrawn textbook's margins hold three instructions and a check already rolled — d20 + nerve against 12 — and Miyamura has not touched the die.

Demon Slayer · Kyojuro Rengoku in a dining car at night, a bone-white d20 with thirteen up between two dinner boxes — **Demon Slayer · Car Nine** — Eight cars on the timetable, nine on the rails. Rengoku sets a bone-white d20 between the dinner boxes: Perception, d20 + 2, DC 13.

Harry Potter · Minerva McGonagall's face in the Floo flame above the trophy room reading desk, the empty case open behind — **Harry Potter · What the Cup Remembers** — The case is open, the lock still locked, and the ten-forty log line written over twice. McGonagall gives you until six.

Horimiya · Hori Kyouko at the clubroom table with a hand-drawn hex map, a dice tin and a pewter knight — **Horimiya · The Ninth Lantern** — A hex map with eight lanterns, a knight two hexes out of place, and the red d20 gone from the tin. Hori gives you until 7:30.

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The Eleventh Door

Harry Potter · Hermione Granger, a door that is not on the Map.

A session, not a blank page.

Neta Studio is an AI world builder. Pick a world that already holds the cast — Hogwarts, a Taisho inn, a school clubroom — and it builds the room around you: the scene, the first line, the check already waiting. You write one action. The GM rolls it in the open, spends what it costs, and a named character answers in their own voice. Close it and the thread is still there.

The die stays on the table — every risky action is d20 + modifier against a DC, with the roll and the cost in the reply. No hidden math, no reroll after the fact.
The cast does the talking — the NPC speaks from the world's own card: Hermione's citations, Shinobu's bedside voice, Hori's refusal to go home.
The session remembers — threads, promises and wounds stay with the work. Reopen it and you are in the same room, with the same count running.

Questions, answered.

Do I need a rulebook, dice or a solo system?

No. You need one sentence: where you are and what you want. The GM brings the d20, the DC and the cast. If you already play Ironsworn or Mythic, say so and it will use that language.

Is this a tabletop game or a chatbot?

A session: a room, a named character, a live conflict, three threads you can pull by acting, and a status bar that changes. It is not a blank chat with a name on top.

How do the dice actually work?

Every risky action is called in the open — d20 + modifier against a DC, the roll and total in the reply, then what it costs: HP, light, noise, a door. No roll is hidden from you.

Do I have to write both sides of the table?

No. You write your character's action; the GM narrates the world and the NPCs answer. You never have to voice the cast to keep the session moving.

Can I play in a world I already know?

Yes. The sessions above were built inside existing worlds — Harry Potter, Demon Slayer, Horimiya. Start in one, or name a world and a cast and build the room.

What does the status bar track?

HP, light and what you are carrying, chosen for the scene. It changes as the session spends them, so a lost torch stays lost and a wound stays open.

How long is one sitting?

Twenty to forty minutes for a full thread. The opening is on screen in a minute, and the session resumes where you stopped.

Can I keep the session or share it?

Publish the work and send the link. It opens on the same first scene; whoever plays takes their own actions, and your thread stays yours.

One chair is a full table.

Name the room and the thing at stake. It comes back as a session: a named character, a d20 in the open, and a box for your move.

Start My Session