Game Description:Thanks to Go! Sudoku for PSP, you'll never have to put that puzzle down! Fans of the addictive numbers game can enjoy one single-player and three multi-player modes (Pass, Versus, and Battle) anytime, anywhere! There are 1,000 preloaded puzzles, plus up to 200 for download. Beginners can get up to speed in no time with Training and Tutorial modes. You can customize game backgrounds with your own photos, track your Best Times for all 1,000 puzzles, and post your records on the Web. Best of all, the game's HELP! System generously allows you to make five errors on each puzzle without penalty.