The 1997 PS1 title I.Q. - Intelligent Qube (aka Kurushi) has the most ridiculously amazing soundtrack for such a basic a puzzle game. There are two games, (Kurushi and Kurushi Final, from 1999), both with great soundtracks.
I've looked around for links of ripped files, but since I haven't found a complete set, here are some some youtube vids with decent enough audio. Since these are PS1 titles it's completely possible to rip near-perfect audio from the game CDs, btw.
- Track medley:
- Some individual tracks:
- Game footage:
- And here's an emulator for the game itself: http://www.emuparadise.me/Sony_Playstation_ISOs/Intelligent_Qube_%5BU%5D/37019