Hidden Door

Hidden Door is an AI-narrated interactive fiction platform, pitched as "Roblox meets D&D" — you and friends make choices together and an AI game master improvises a story that adapts to them in real time, rather than following a pre-written branching script. Launch worlds are built from familiar public-domain and licensed settings (Call of Cthulhu, Pride and Prejudice, The Wizard of Oz), so players start from a world with established tone and characters instead of a blank page. Aimed less at authoring a game's story ahead of time and more at generating one live, socially, as it's played.