It's that demo disc that was given away before the launch of the PS1. It has that "famous" T-Rex 3d model According to the PSX Book: - Hear It Now!, Play it Later! SCUS-94950. Also called the "Black Ice" CD or the Developers Demo Disc. Includes the T-Rex demo.
More on the T-Rex demo here on my site: http://uk.geocities.com/sabre470/2006/05/dino-demo-psx.html :nod: Sabre
heh I remember getting the disc with that when I bought my first PS1 many years ago here in Australia I liked the music from the Manta demo a little bit more (I also liked playing Battle Arena Toshinden 2 :redface
The Demo 1 disc did indeed come packaged with the first release Playstations in Europe. It also has a bunch of game demos and a visualiser type cd thing. Shame they didn't put the deforming coke can demo on the disc as well!