The object of this game is to end up with a board filled with only zero's. When you tap on a field the number in this field and all the neighbors (horizontal, vertical and diagonal) are decreased by one, hence the name minusOne.
The game can be played on boards of sizes 3x3, 4x4 and 5x5 and you can choose from five levels of difficulty.
Don't be fooled by the simplicity of the rules, you'll soon discover that larger boards and higher levels are real brainteasers.
The number of puzzles in this free version is limited, see if you can solve more puzzles than your friends.
--- FULL VERSION ---
* No ads.
* Thousands of different puzzles.
* Increased the number of free levels to 64
* Minor bugfixes