Free cognitive tests to measure and improve your mental abilities
Interactive storytelling platform where you play, create and share stories in beloved worlds
Stage
Not given
Established
Founded
Not given
2020
Based in
Not given
US
Pricing model
Free
Freemium
Pricing
Not given
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).
Key features
Reaction Time Test - measure response to visual stimuli
Visual processing tests including Visual Memory, Symbol Search, and Color Blindness
Score tracking and comparison to other users
Leaderboard functionality
Aim Trainer test
Color Hue Test for color distinction
FPS Reaction training including Gridshot, Flick, and Tracking
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
What makes it different
No signup required - tests available immediately without account creation
Tests based on established research protocols rather than casual games
Scores stored locally in browser with no personal data tracking or sale
Accessible cognitive testing without requiring lab or academic credentials
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
Human Benchmark
Hidden Door