Go! Sudoku brings the logic-based numbers game to PSP with 1,000 puzzles and multiple game modes. In addition to the basic solo game, players will be able to challenge friends in a race for fastest time and highest score. Those new to Sudoku can hone their skills with separate training and tutorial modes, while veteran players can save their personal records or go online to see other top scores. Other notable features include customizable backgrounds, the ability to download additional puzzles online, and a built-in help system that allows a maximum of five errors without penalty.