Inspired by this thread:
http://www.digitpress.com/forum/viewtopic.php?t=11616

Let's get a list going. If you know any off the top of your head, let us know and I'll update the list you see here accordingly.

NOTE: Our member "Melf" created a very simple "how to" for burning your game CD's to music CD's. You can get that right here:
http://www.digitpress.com/archives/arc00013.htm

3Xtreme
Activision Classics (only intro BGM)
Alien Trilogy
Allied General
Amazing Virtual Sea Monkeys - not a very good soundtrack but still.
Arcade's Greatest Hits: Williams (only a short voice clip on track 2)
Battle Arena Toshinden
Blast Radius
Bowling
Brahma Force
Carnage Heart (nothing to get excited about, really)
Castlevania: Symphony - one track.
Codename: Tenka - very techno.
Crazy Climber, Arcade Hits (JP) (crazy stuff, indeed)
Critical Depth
Cyber Sled
CyberSpeed
D
Darkstalkers
DarkStone
Devil Dice (cool techno)
Die Hard Trilogy
Doom
Forsaken
Fox Sports Golf '99
Galaga: Destination Earth - updated classic themes.
Grand Theft Auto - complete radio soundtracks. Great for your car CD player!
Italian Job
Jampack Vol. 1
Jampack Vol. 2
King of Fighters '95
Legacy of Kain Soul Reaver: Eidos Demo Disk Volume 5
Lost World, The: Jurassic Park
Lunar Silver Star Story Complete Disk 1
Lunar Silver Star Story Complete Disk 2
Lunar Silver Star Story Complete, Making of
Mass Destruction
MDK
Mega Man 8 - just one track.
Monopoly
Monster Rancher
N2O - has a good portion of the Crystal Method album "Vegas" built in.
Namco Cool Games Free Stuff Demo CD
Namco Museum Vol. 1
Namco Museum Vol. 2
Namco Museum Vol. 3
NGEN Racing (techno)
NINJA: SoD
Official US PlayStation Magazine Demo Disk - maybe all of them.
Pac-Man World
PlayStation Developer's Demo CD
PlayStation Picks - demo CD in green paper case that could be bought separately
PlayStation Picks - demo CD that came with PlayStation on Christmas right after it was released
PlayStation Underground Jampack
PlayStation Underground Jampack Summer 2k
PlayStation Underground Jampack Winter '98
PlayStation Underground Jampack Winter '99
Power Moves Pro Wrestling
Pro Pinball
Pro Pinball: Big Race USA
Pro Pinball: Fantastic Journey
Pro Pinball: Timeshock!
Project Overkill
R4 Ridge Racer Type 4 Disk 2 Ridge Racer Bonus Turbo Mode Disk
Rayman
Ridge Racer
Risk
Robotron X - very speedy techno.
Rollcage Limited Edition Game - has more tracks than the actual music CD that it comes with!
Saltwater Sportfishing
Sentinel Returns
Shadow Madness/Jade Cocoon Demo CD
Sheep
Silhouette Mirage
Street Fighter Alpha
Street Sk8er 2 - Shootyz Groove, Ministry, and more.
Super Puzzle Fighter II - one track instrumental of "Sakura's Song".
Tekken 2 - just one track.
Tekken 3
Three Stooges, The
Tigershark
Tobal No. 1
Tomb Raider
Tomb Raider 2
Tunnel B1
Twisted Metal 2 - check out the Hong Kong track theme.
Twisted Metal 3 - White Zombie, etc.
Tyco RC
Vib Ribbon - Japanese version, complete soundtrack.
Viewpoint
Warhawk
Wild 9
WipeOut 3
WipeOut XL