The objective of this game 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 contains all of the digits from 1 to 9. [Game Features] - 4 types of difficulty, a total of 8000 stages - Check out your skills in Challenge Mode!(random issue, Time Attack, maximum difficulty, without a hint) - Provides a highlighting feature for user convenience. - Provides a playing data save and load. - Supports Achievements and Leaderboards. -