Sony has a system selling quadruple-A, driving simulation that turns the volume up to eleven. Gran Turismo 5 Prologue is that impressive. Remember when FiringSquad reviewed GT3 and said it was the most fun they've had in a long time? Gran Turismo 5 brings that level of excitement back to the series. Part of this excitement comes from the fact that Polyphony Digital includes three of the hottest cars on the planet in this demo, the BMW 135i, the Mitsubishi Evo X, and the new Nissan GT-R.