Hidden Door

Hidden Door brings the collaborative, improvisational nature of tabletop RPG dungeon mastering to a digital platform — an AI that can improvise endlessly in response to player choices.

## The AI Dungeon Master

Hidden Door's AI serves as narrator, character voice actor, and game master simultaneously: - Describes scenes and environments in rich detail - Plays non-player characters with consistent personalities - Tracks story state, character relationships, and world lore across sessions - Generates new story beats that logically follow from your choices

Unlike scripted narrative games with branching dialogue trees, Hidden Door's AI can respond to anything you type — try something unexpected and the AI incorporates it into the narrative rather than hitting a dead end.

## Licensed Worlds

Hidden Door has licensed IP partnerships to create adventures set in established fictional universes. Players can explore stories in familiar settings with canonical characters, while the AI maintains consistency with the source material's tone and lore.

## Multiplayer

Hidden Door supports multiplayer sessions where multiple players collectively drive the story. The AI dungeon master manages all players' inputs simultaneously, maintaining narrative coherence across concurrent character actions.

## Session Continuity

Adventures persist across sessions — the AI remembers where your story left off, character relationships developed, choices made, and consequences unresolved. Return to an active story and pick up mid-narrative.

## Target Audience

Hidden Door targets tabletop RPG players who want the experience of a DM-run campaign without the scheduling overhead of gathering a group. It also appeals to collaborative fiction writers and interactive story enthusiasts.

## Funding and Team

Hidden Door raised $12M in Series A funding (2022). The founding team includes AI researchers and game designers with backgrounds at Pixar, Disney, and major game studios.