Interactive storytelling platform where you play, create and share stories in beloved worlds
Nine letters. One hidden word.
Stage
Established
Startup
Founded
2020
2026
Based in
US
US
Pricing model
Freemium
Free
Pricing
Free tier includes unlimited play across all worlds, character chat, and personal profile. Creator plan available for creating and sharing custom worlds (price not specified on pricing page).
Not given
Key features
Interactive fiction gameplay with branching narratives
Character chat and side conversations
Atlas world-building studio
Licensed worlds from film and publishing partners
Modifier cards for story customization
Private and public world sharing options
Creator API for building custom experiences
Hand-drawn art and human-written narrative beats
New puzzle every day at midnight in local time zone
Build words of four or more letters using center letter
Each tile can be used once per word
Streak tracking by solving the nine-letter word
Archive of past puzzles available to play
Optional daily email subscription
No account or login required
Built for single thumb play
What makes it different
Protects creator IP and never trains models on partner content
Narrative world model ensures canon compliance across all player stories
Human-created narrative beats and art paired with specialized AI
Transmedia experience combining fanfiction, RPGs and social gameplay
Small tuned models that outperform larger general models on narrative tasks
Same grid for everyone each day without competitive leaderboards
No ads, no app needed, plays in any web browser
Includes Journal with strategy guides and focus articles
Hidden Door
Ninefold