Sudoku Gridmaster ('Sudoku Master in Europe, 'Puzzle Series Volume 3: Sudoku in Japan) is a Nintendo DS video game by Hudson Soft that was released in 2006 worldwide (excluding Australia, where it was released on February 22, 2007). The game was published by Hudson Soft in Japan, though in America, Europe and Australia Nintendo published it. The game is simply a version of the popular sudoku puzzle game for DS. Prior to this game being released, hundreds of sudoku puzzles were made available in Brain Age: Train Your Brain in Minutes a Day!