Built for an ordinary browser
You do not need an account, a download or a subscription. Game logic runs on your device. Completed results can be stored locally so you can return to your personal bests. There is no public leaderboard or cloud account.
Honest about the numbers
We publish the scoring rule next to every game. We do not turn game results into an IQ, brain age, diagnosis or population percentile. Practising a game can make its rules and controls more familiar; we do not promise that a better game score transfers to everyday abilities.
Understand your game scoresOur editorial approach
The game instructions and playing guides are written for this collection, and describe the games we actually provide. We use familiar puzzle ideas while creating our own interface, code and explanations. Guides offer practical ways to play, not medical advice.
See what’s new