Cars are unlocked in the first PGR one at a time by completing a set challenge, for example the Chevrolet Camaro SS is awarded after you complete Quick Race level 2.
Or you can cheat. Create a new profile and give it the name Nosliw... just as it's spelled, it's also case sensitive.
Here is a list of cheats....
Master cheat:
Enter your driver's name as Nosliw to get all of the cars, tracks and paint jobs.
New Paint Job:
5 hours of gameplay will give you the medal pursuit (new paint jobs).
Faster Mercedes:
Enter Reki as player name to unlock a faster Mercedes
Cool Cars:
Earn 1000 Kudos and get VW Bug. Earn 25000 Kudos and get Panoz Esperante.
Unlock the Delfino Feroce:
Earn 75,000 to receive the Delfino Feroce:
Unlock the Lotus Exige:
Earn 50,000 to receive the Lotus Exige.
New Helmet:
After you play for one hour you get a new driver's helmet.
Ferrari F-50:
Get 200,000 kudos to unlock the Ferrari F-50.
Free Roam in Time Attack Mode:
Win a silver or gold medal in all parts of kudos challenge mode for a city. Select time attack mode and a "Free Roam" option will be unlocked for that city
Only a few more weeks until turkey genocide.
