Infinite fun About the Game Sudoku (数独 sūdoku, digit-single) — is a logic-based, combinatorial number-placement puzzle. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 subgrids that compose the grid (also called ‘boxes’, ‘blocks’, or ‘regions’) contains all of the digits from 1 to 9. 150 brain-teasing Sudoku puzzles Random level generator Level’s progress save Beautiful minimalist design, multiple color themes 10 ambient relaxing soundtracks Achievements with Latin and Cyrillic characters Trading Cards, Badge, Emoticons and Backgrounds Steam Cloud support