Dot Code Breaker
Dot Code Breaker is a free puzzle game for kids 6 and up, families and classrooms. It plays in the browser on phones, tablets, and computers, with no download, no sign-up and no chat.
Free, no sign-up. Plays right here in your browser.
About the game
Dot Code Breaker is a code-breaking logic puzzle you can play for free in your browser, on a phone, a tablet, or a computer.
Somewhere in the grid of nine dots hides a secret path. Draw a path of your own and the game marks it at once. A filled dot means one of your dots is in the code and in the right place. A ring means a dot is in the code but belongs somewhere else in the path. A cross means a dot is not in the code at all. Each try is kept as a small card, so you can compare your guesses and narrow the code down.
Codes are 4, 5, or 6 dots long. Play Practice with no limits to learn the marks, Challenge to crack the code in 10 tries, or Countdown to beat a 60-second clock. Switch mode or length any time with the buttons beside the grid. The game keeps your best for every mode and length, so there is always a score to beat.
How to play
- On a phone or tablet: drag your finger from dot to dot, or tap the dots one at a time. Lifting your finger keeps the path, so you can mix drags and taps.
- On a computer: drag with the mouse, click the dots one by one, or type 1–9 (the dots are numbered on screen). Backspace takes a dot back and C clears the path.
- A line that runs straight over a dot picks that dot up too.
- Tap the last dot again to take it back, or press Clear to start the path again.
- On a phone or small screen, tap ? to see what the marks mean: "Right dot, right spot", "Right dot, wrong spot" and "Not in the code".
- Once your path is as long as the code, it is checked right away. If you run out of tries or time, the game shows you the code.
Tips
- Start with a path that covers dots you haven't tried yet. Crosses rule dots out fast.
- When you see a ring, keep that dot but move it to another step of the path.
- Change one dot at a time to find out which dot made the difference.
- In Countdown, the clock stops whenever the game is paused, and it waits for a tap (or Enter) before it starts again, so you never lose time to an interruption.
Good to know
- Free to play in the browser, with no download.
- Practice has no timer and no limit, so nobody can lose a Practice round.
- Your bests and your last mode and length are saved in your browser.
Questions and answers
Is Dot Code Breaker free?
Yes. It's free to play in your browser, with no download, no sign-up and no chat.
Does it work on a school Chromebook?
Yes. It works on phones, tablets, computers and school Chromebooks, right in the browser.
What do the marks mean?
A filled dot means one of your dots is in the code and in the right place. A ring means a dot is in the code but belongs somewhere else in the path. A cross means a dot isn't in the code at all.
Can I play with a keyboard?
Yes. Type 1 to 9 to pick a dot (the dots are numbered on screen), or use the arrow keys and Space or Enter. Backspace takes a dot back, C clears the path, and Enter or Space plays again at the end. Changing the mode or the code length uses the buttons beside the grid.
Is my progress saved?
Yes. Progress is saved in this browser on this device. Your best for every mode and code length is saved, along with the mode and length you last played.
Credits: built on an open-source game, used under the MIT license. See the full credits
