Unlock the S Class Events
"Gran Turismo 5" has three different classes of race events: class A, B and C. There is one more class of race event that can be unlocked and competed in, but only once you have completed a task in the game. The task you must complete is to achieve a bronze medal or better in the race events of classes A, B and C. Once you have done this, you can drive in a further 10 races within the S class events.
Unlock the Nissan Skyline Coupe Concept '07
There are a number of cars that can be used only once they are unlocked in "Gran Turismo 5 Prologue." The Nissan Skyline Coupe Concept '07 is a one of these cars. To unlock the Nissan Skyline Coupe Concept '07 and make it available to drive within the game, all of the Class A races must be completed.
Unlock the BMW Concept 1 Series tii '07
The BMW Concept 1 Series tii '07 is a new take on the classic two-door BMW Series 1 that strips unnecessary weight to increase its sporting performance. This car can be used in "Gran Turismo 5 Prologue" once it has been unlocked. To unlock this car, all the races in the Class B events must be completed.
Unlock the Diahatsu OFC-1
The Diahatsu OFC-1 is a concept model of a compact convertible sports car. This car is not available to drive in "Gran Turismo Prologue" until a specific task has been completed. To unlock the Diahatsu OFC-1, all the races in Class C events must be won.