Sudoku is a classic puzzle game that has been enjoyed by millions of people for decades. The game is played on a 9x9 grid, which is divided into 3x3 sub-grids called "regions". The objective of the game is to fill the empty cells with numbers from 1 to 9, ensuring that each number appears only once in each row, column, and region.

Sudoku offers four different modes of difficulty - easy, normal, difficult, and nightmare. Easy, medium, and difficult games have a unique solution, while nightmare games have multiple solutions. Sudoku also offers many settings, including support for both tablets and phones, autosave, statistics, and unlimited undos.

Whether you're a seasoned Sudoku player or new to the game, Sudoku is a great way to challenge your mind and pass the time. Download it for free on Android today!