Love tabletop RPGs, but can't find a group?
No time for long sessions? No Game Master available? DungeonOne solves this by putting a brilliant, always-available AI Game Master in your pocket.
The Problem
No scheduling. No group needed.
Just you, your character, and an infinite world of adventure — whenever and wherever you want.
What Is DungeonOne?
DungeonOne is a mobile app that lets you play a classic fantasy tabletop RPG completely solo. An advanced AI acts as your Game Master — narrating the story, controlling NPCs, adjudicating rules, and adapting the adventure to your choices in real time.
Key Features
🎲 True Single-Player TTRPG
Play with a complete fantasy RPG ruleset — full character stats, spells, inventory, abilities, hit points, conditions, and effects. The AI Game Master handles everything a human GM would: combat, exploration, roleplay, and dice rolls.
🧠 AI-Powered Narrative
Powered by leading AI models (OpenAI, Anthropic, Gemini, DeepSeek, Mistral, OpenRouter, and more), the AI dynamically crafts each scene based on your actions. Every choice matters. Every playthrough is unique.
🏰 Ready-Made Campaigns
Jump into professionally written adventures across multiple worlds. Campaigns range from quick one-shots to epic full-length sagas. Some are free; premium campaigns unlock with subscription.
🌍 Open-World Sandbox
Prefer to forge your own path? Start in an open world where the AI generates locations, NPCs, quests, and encounters on the fly. Explore cities, dungeons, forests, and more — the world evolves with you.
🧬 Full Character Creation
Create your hero from scratch with all fantasy races, classes, and backgrounds. Manual stat entry or one-tap random generation. Level progression with XP tracking, spell slots, Ki points, superiority dice, and class resources.
📖 Interactive Journal
Track your journey with a living journal — Notes (the AI incorporates them into the story), Quests (active and completed objectives with rewards), World (map of discovered locations, NPCs, and their reputations).
💾 Save & Continue Anywhere
Local saves let you pause and resume instantly. Cloud saves (with account) sync across devices. Pick up exactly where you left off, even mid-combat.
🎵 Immersive Atmosphere
Dynamic music and sound effects adapt to your situation — tense battle themes, mysterious dungeon ambience, bustling tavern chatter, and more.
🌐 Multi-Language Support
Play in your preferred language. The AI responds in the language you select, with full localization support.
Why DungeonOne?
| Traditional TTRPG | DungeonOne |
|---|---|
| Needs 3–6 players + a GM | Play alone, anytime |
| Requires scheduling | Instant access, no waiting |
| GM must prepare sessions | AI is always ready |
| Fixed storylines | Dynamic, adaptive narrative |
| Physical books & dice | Everything in your pocket |
Perfect For
Solo RPG Enthusiasts
For players who love the depth of tabletop RPGs but prefer to play on their own terms.
Can't Find a Group
No friends available? No local game store? The AI Game Master is always ready to play.
Commuting & Downtime
Turn your commute, lunch break, or waiting time into an epic adventure.
Newcomers
Learning the ropes? The AI guides you through every step, from character creation to combat.
Veterans
Experiment with builds, test new strategies, and explore infinite storylines without preparation.
Anyone
Anyone who wants to experience a living, breathing RPG world — no setup required.
Pricing
Free to Play
Always free to play in the open world without a ready campaign, plus one ready campaign with an interesting plot. No credit card required.
Subscription
Unlock all campaigns, unlimited cloud saves, and premium AI features. Available monthly or annually (with savings).
Coming Soon
Multiplayer
An AI Game Master will narratively guide the game for you and your friends. Early access for subscribers.