Sony is hoping to pull out its killer card in convincing thousands of adults that a PSP is a good idea when it launches Go! Sudoku on the PSP this December.
Based on the Japanese number puzzles that have taken the world by storm, Go! Sudoku offers over a 1,000 brand new puzzles and will have additional puzzles available for download.

Challenge yourself with four levels of difficultly from easy to fiendish. Relax with a quiet Sudoku challenge or experience the first ever multiplayer Sudoku competitions.

Gamers will also be able to complete with animated background themes, time goals, music and sound.

Go! Sudoku offers players a multiplayer option where up to four people can play a range of games including pass, versus or battle for competitive or collaborative gameplay.