Hidden Door
VerifiedAI story game platform for playing and building interactive fiction worlds
Product preview
Hidden Door
What it is
Hidden Door is a story game platform from a Brooklyn team founded in 2020 by Hilary Mason and Matt Brandwein. Players step into worlds built from classic and contemporary fiction, including Dracula, Sherlock Holmes, Pride and Prejudice, The Call of Cthulhu and The Land of Oz, and make choices while an AI narrator keeps the story consistent with the setting, its characters and its rules. Formats include interactive fiction, private character chats, social games with friends, comics and audio series. Creators can build their own worlds in the Atlas studio or start from a one-line idea, and publish them publicly or share with friends. Playing the catalog is free, while a Creator subscription is needed to make and share worlds.
Key features
- AI-narrated stories in established fiction worlds
- Private chats with story characters
- Multiplayer social story games
- Atlas studio for building your own worlds
What we liked
- + Free unlimited play across the catalog
- + Narration respects each world's rules and cast
- + Tools for writers to publish their own worlds
Worth noting
- · World creation and sharing need a paid plan
- · Creator plan pricing is not listed publicly
Editor's notes
More context from AI BirdView
Open-ended AI storytelling can drift quickly, with characters forgetting who they are and plots losing their shape. Hidden Door tries to solve that by grounding play in defined worlds that carry their own characters, relationships and rules, so a story in a Victorian mystery still feels like a Victorian mystery several scenes later. It also treats authors as partners, giving them tools to build worlds that other people can play.
- A catalog of worlds based on well-known fiction, from gothic horror to Oz
- Several ways to play, including solo fiction, character chats and group games
- An instant world feature that expands a one-line idea into a playable setting
- A dedicated world-building studio for writers and creators
- Free play across every world, with paid features reserved for creators
Hidden Door is best for readers, tabletop roleplayers and writers who enjoy guided storytelling more than freeform chatbots. A practical tip: begin with a world based on a book you already know well, because familiarity makes it easier to see how the narrator stays faithful to the source, and then try the instant world prompt to sketch a setting of your own.
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