AI Dungeon

AI Dungeon pioneered the idea of using large language models as a game master. Rather than following a scripted plot with a handful of dialogue choices, the game takes whatever you type — a line of dialogue, a spell, a decision to run away — and writes the next passage of the story around it. That makes every playthrough unique and lets players go in directions that traditional game writers would never have anticipated.

The platform ships with a library of ready-made worlds spanning fantasy, sci-fi, horror, mystery, romance and survival genres, plus an editor for creating and sharing your own scenarios and characters. You can publish scenarios publicly, remix ones made by other players, and continue a single save across sessions so a campaign can stretch over weeks.

AI Dungeon is available in the browser and as an iOS and Android app. A free tier lets you play with the standard model and a daily allowance of actions, while paid subscriptions unlock better language models, more context memory, image generation, and additional features for longer, more coherent stories. It is aimed at players who enjoy improv-style storytelling and writers who want a sandbox for testing ideas.