Carol Vorderman's Sudoku - Sony PSP Over 1,000,000 unique Sudoku puzzles 4 difficulty levels, a level to suit all players, from beginners to experts Easy to use interface and grid assistance Exclusive videos: Over 30 minutes of live-action video including an introduction to Sudoku, step-by-step tutorials, hints and tips for all levels of players Multi-player Hot seat and wireless play; Go head-to-head or take on the hot seat and win by solving puzzles in the fastest time. (PSP only)