Their were several other games on it. just a promotional thing for sony or maby the PS underground or something like that.
[EDIT]
I just looked at the package. It was part of some kind of sweepstakes. "Win 500,000 dollars or other playstatiuon prizes and stuf. brought to you by pizza hut and playstation." Like I said, a promotional thing.
The demo isn't very great. Their are only 2 cars to use (Lancer Evo (the engine sound for the Lance sounds horrible) , and Mustang GT) the only track available is Rome and when you use the Lancer, the speedometer say 200 when you are relly going about 60mph. So the game has a lot of bugs but the full version probably has the same ammount.
Oh yeah, I also got a playatation disk with the GT2 soundtrack. I know it had a few game saves on it, but I think it had a demo on it too. I cant remember though.