For the past couple of years Sudoku has become a game that is both addictive and fun. It is a logic based, combinatorial, number placement game. The goal in this game is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 sub-grids that compose the grid contains all of the digits from 1 to 9. These types of games first appeared in 1986 by the Japanese puzzle company Nikoli, under the name Sudoku, meaning single number.[4] It became an international hit in 2005. And like most games today, Sudoku has managed to have a successful transition from paper and pen game to the all popular iphone. One of the most famous and sought out games is Freeware’s Big Bang Sudoku which features well over 10 000 sudoku puzzles, which promises a great fun, this game also offers you a Portuguese language support. This game also is known for its great sound, graphics and animation. So it’s a full package definitely. The controls are easy and simple, as you might have guessed, simply click on the numbers and blanks you wish to fill. At the beginning you might find this game be a little to easy, but that is just warming up, as you move forward you will see that there is nothing easy or simple about it.