Just when it looked as though Guitar Hero was about to drown in an unedifying pit of franchise-milking, Activision has come up with a truly original version of the game on the DS. It takes the form of a plastic faux-section of a guitar-neck, studded with the four familiar colour-coded keys, and equipped with a strap through which (if you're right-handed) you place your left hand. Hold the DS like a book, and you can play the game by strumming the touchscreen with a plectrum-shaped stylus; blow into the microphone and Star Power is activated. Astonishingly, this gives you the full, uncompromised Guitar Hero experience on a tiny handheld. It does, however, make your left hand ache something chronic if you play more than a couple of tracks off the reel - regular breaks are in order. But it has a stonking selection of music, mixing hoary old rock from the likes of Jet and Santana with more modern music from bands like Blink 182 and Maroon Five. And it's every bit as addictive (and fearsomely tricky in hard mode) as its console predecessor.