The Fill

Sharpen your mind with a connect-the-block-style one-line brain training puzzle game. A simple but addictive one-line puzzle game that’s completely free to play. Your brain becomes more active the more you play. During your commute, before you sleep… enjoy downtime with brain training. The rules are extremely simple. Just fill in all of the blocks using only one line. Use hints for puzzles that are too hard to solve. Hints are also free, of course.

Play The Fill online free, directly in your browser. There is no download, no account and nothing to block — it works instantly on desktop, tablet and mobile, and it is unblocked on school, work and restricted networks. If you enjoy The Fill, the puzzle games below are a great next stop.