From the Back of the Box Do you Sudoku? Now you can get your Sudoku fix wherever and whenever you want with Go!Sudoku - the most addictive puzzle game on PSP. Use simple logic to place the numbers 1 to 9 in the correct positions until the whole Game Grid is full, ensuring that every column, every row and every 3x3 box contains the numbers 1 to 9 only once, without any duplications.