About 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.
Game Highlights
- Exercise your mind with challenges that boost cognitive skills
- Enjoy a focused single-player experience at your own pace
Game Details
- Category
- Brain Games
- Platform
- Browser (desktop & mobile)
Frequently Asked Questions
What is The Fill?
The Fill is a free online brain game you can play right in your browser. 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...
How do I play The Fill?
Read each challenge carefully and use your mouse or keyboard to submit answers. Take your time to think it through. The Fill loads instantly in your browser — just click PLAY to start.
Is The Fill free to play?
Yes, The Fill is completely free to play online. No downloads, no installations, and no sign-up required — just open your browser and start playing.
Can I play The Fill unblocked at school?
The Fill runs entirely in your browser, so there is nothing to download or install — that is what makes it work on school and work computers, including Chromebooks. Whether the site itself is reachable depends on your network's filters, which are set by your school or IT administrator.
