Color Sudoku is described as 'Sudoku game with numbers, letters or colors. Board size can be from 4 to 20 (default size is 9). You can play many variants - Killer, Greater Than, Consecutive, Odd/Even, Diagonal, Samurai. This program contains editor, solver and can create PDF' and is a Puzzle Game in the games category. There are more than 25 games similar to Color Sudoku for a variety of platforms, including Android, Android Tablet, iPad, Windows and Web-based apps. The best Color Sudoku alternative is LibreSudoku, which is both free and Open Source. Other Color Sudoku like games are Sudoku Challenge, Sudoku & Variants, Gauguin and Open Sudoku.