Here's some maths you may actually want to do. GT4 Prologue is a cutdown version of the full game, which isn't out until the end of the year. It has five tracks, 61 cars, a bonus DVD with neat personal message from GT inventor Kazanori Yamauchi, and not a sniff of GT4's online mode. The full version should have over 500 cars and 100 tracks, so you're getting about 10% of the full game.
Right, let's see... you're paying 24.99, 60% of the price of a full game, for 10% of that game's content. Which, on paper, is about as value-packed a buy as a rusty 1989 Nissan Sunny with a wheel missing and bloodstains on the bonnet.
Fuel It Up But that's not really the point. Lamborghinis are really expensive, but at the end of the day they get you down the shops just as well as a Micra. The extra money goes on the pleasure you get from driving an amazing automotive work of art. And all the girls you'll pull.
And make no mistake, GT4 Prologue contains the purest driving experience on any console - it's steak to Burnout and NFS: Underground's burgers. Still, if you'd rather chow down on some arcade racing it's not for you, and the refinements visible in Prologue suggest that GT4 won't do anything to change your appetite.
The fundamental experience is the same: perfect. It actually feels like an add-on for GT3 at this stage, but what an add-on. GT3's visuals are still rarely bettered on PS2, and GT4's graphics stink of quality like a fart in a Ferrari.
Fuel It Up The flat tyre on all this is the fact that the only real play you'll get out of GT4 Prologue is 41 licence tests that start out patronising and end up crazily frustrating, then razzing the cars you've unlocked on the five fantastic tracks. Even if you're a hardcore GT fan the fuel tank empties really quickly.
This is a very limited test-drive of the monster that GT4 will be, and as long as that's all you're expecting you won't be disappointed. You might only be getting 10% of the full game but, for a wee while, it's still 100% petrolhead heaven.
Your driving test is probably the crappest, most intense, most pant-messing hour you'll ever spend in your life, so making a game out of it probably isn't a good idea. Admittedly, you get to drive Dodge Vipers rather than your instructor's clapped-out Peugeot, but we reckon a progressive arcade racing mode would have been better than Prologue's patronising lessons.
Later on you have to overtake cars without even grazing them – while they brake right in your racing line.
The rally tests are the most fun because of the hugely different handling model – powerslide central!
Driving through cones is a bit more fun, but one mistake and you have to do it again which is dead annoying
Learning how to steer: aka a big bunch of arse. We reckon we can manage on our own, thanks
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Do any of you people know any cheat code for this games. I just need it for the driving mission cause it damn hard to play. 
