MyInside Gaming - The credits for Gran Turismo 5 is the first thing you’ll see the first time you load the game up – and every time after that. In normal circumstances, I’d view this as a vain move from the developer. How dare they spout their names at us! But Gran Turismo 5 is different. Polyphony spent six years cradling their baby, and six years is a long time. The fruits of their labour? Over a thousand cars, 71 tracks and the privilege to display their credits at the start of the game.