Sudoku Seasons video review. Classic Game Room presents a CGR Undertow video review of Sudoku Seasons from 99Games for the iPhone. Sudoku Seasons is sudoku with seasonal themes. It includes holiday themed backgrounds, and instead of using numbers, it has objects corresponding to the season. The game has six themes to choose from, as well 90 levels to play, and it's also a universal app. Fortunately, you can also just use numbers, if you prefer.