I'm going to get this hopefully before the weekend.

The full game has 500 cars from 1950 to Present and 100 tracks to drive them on. And to give you an indication of the accuracy the GT4 team reproduced the Nurburgring to within 15mm of accuracy. It’s so authentic that Nissan’s test driver drove the real circuit and then played it on GT4—and wound up with times within 5 seconds of each other.

Info on prologue which is out now, release on the 28th of May.

To reward the patience of GT fans waiting for the return of this epic challenge, Sony Computer Entertainment Europe announces the arrival of GT4: Prologue Signature Edition, a unique preview of the action coming soon in GT4.

The latest technological advances, including a new physics engine and improved graphical polish are showcased in Prologue, and this limited edition also features a “Making of GT4” movie prepared by the producers of Top Gear.

Key Features:

46 License tests to improve your GT Driving Skills.
54 cars to unlock - each with realistic handling and dynamics.
High quality ‘Making of GT4’ movie which previews the biggest PS2 game ever.
Code generated in ‘Time Trial’ mode allows for competitions via GTWorld website.
Unique numbered and signed silver presentation pack with message from Kazunori Yamauchi the creator of GT.

More info and gallery:

http://au.playstation.com/news/gt4prologue.jhtml

 

i played the Chinese Version one. Got up to the S2000 race with other S2000 then i gave up. Can't beat it I guess i'm suck driver

But i got the Nismo Z and Roadster unlocked