Sudoku Countdown is a puzzle game. There are 9*9 lattice, you need to fill them all. However, it is not easy to do that, because you cannot make them to duplicate, both in the 3*3 square and any lines. So you need to work out this game in 999 seconds. Use your intelligence to challenge the troubles. Come on! The online game Sudoku Countdown is a free game to play on PC, Mac or Laptop computers. You can read the game comments below on Sudoku Countdown, which may contain cheats and tricks, cheat codes, tips and full game solutions. You can play Sudoku Countdown for free on Internet, or download this game on your computer to play it off-line.