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, Windows, Android Tablet, iPad and Mac apps. The best Color Sudoku alternative is LibreSudoku, which is both free and Open Source. Other Color Sudoku like games are Gauguin, KSudoku, Open Sudoku and Sudoku (FLTK).