Go! Sudoku

Go! Sudoku is a sudoku puzzle game launched on the PlayStation Portable on December 2, 2005, in Europe and on March 21, 2006, in North America. Later, on April 27, 2006, it was launched in Japan under the name Kazuo (カズオ), as Nikoli owns the Sudoku trademark, and Kazuo was chosen to differentiate it from Sudoku. Gamers, in general, and professional critics gave the game a mediocre rating overall. The main tournament consists of 1000 different Sudoku puzzles organized by difficulty level, in addition to many game modes, adjustable grids, and multiplayer support. The official website for Go! Sudoku offers players the ability to download an additional 200 puzzles, and they can also add their personalized backgrounds to the games they play.