Gran Turismo 5: Prologue

Quick Tune options
Win all the A Class events to unlock the Quick Tune options, which allow you to adjust the weight of your car, horsepower, aerodynamics, gearing, and other settings.

S Class events
Successfully complete the main A, B, and C Class events with a "Bronze Medal" or higher rank to unlock the S Class events.

Bonus cars
Successfully complete the indicated task to unlock the corresponding car:

BMW Concept 1 Series tii '07: Win all B Class races.
Daihatsu OFC-1: Win all C Class races.
Ferrari F2007: Win all C, B, A, and S Class races.
Nissan GT-R Proto '05: Win all S Class races.
Nissan Skyline Coupe Concept '07: Win all A Class races.

Events walkthrough
It is recommended you do the following events in the indicated order:

Purchase the Honda Integra Type R '04
Race C-1
Race C-4
Race C-5
Race C-7
Race C-8
Race C-9
Race C-10
Purchase the Suzuki Cappuccino '95
Race C-2
Race C-3
Race C-6
Win the Daihatsu OFC-1 '07
Purchase the Mitsubishi Lancer Evolution IX GSR '05
Race B-1
Race B-2
Race B-3
Race B-4
Race B-5
Race B-7
Race B-10
Get in the Honda Integra Type-R '04
Race B-6
Purchase the Nissan R35 GT-R '07
Race B-8
Race B-9
Win the BMW Concept 1 Series ti '07
Get in the Nissan R35 GT-R '07
Race A-1
Race A-4
Purchase the Ford GT '06
Race A-2
Race A-6
Race A-7
Race A-10
Purchase the BMW M3 Coupe '07
Race A-3
Purchase the Honda NSX Type R '02
Race A-5
Race A-9
Purchase the Ferrari F430 '06
Race A-8
Win the Nissan Skyline Coupe Concept '07
Note: In the S Class events, Quick Tune your cars before each race. If your car is above the point limit, drop the horsepower to meet the point requirement for the race. If your car is below the point limit, drop your weight and raise your horsepower to match the point limit. There is no reason to drive a car below the point limit unless you really want to challenge yourself.

Get in the Honda NSX Type-R '02
Race S-1
Race S-4
Get in the Ford GT '06
Race S-2
Race S-5
Race S-8
Race S-9
Purchase Mine's BNR34 Skyline GT-R '06
Race S-3
Race S-7
Race S-10
Purchase the Ferrari F40 '92
Race S-6