Ah, this thread pops up about once every 6 months.
Here is my rather extensive list that I use for gaming (thank goodness for those 300-CD players). I've found that soundtracks of all types (notably movie, anime, and video game) are excellent for gaming. It is recommended that you do *not* play music that is widely recognized (namely "Star Wars"), as you will likely evoke images that are not appropriate for the scene you are describing (unless, of course, you're playing a Star Wars game - in which you would only want to use Star Wars music). Anywho, the list (not comprehensive, since I'm at work and going by memory) that I use:
- Baldur's Gate
- Brain Powerd 1-2
- Brave Fencer Musashi
- Breath of Fire 1-5
- Chrono Trigger
- Chrono Cross
- Conan the Barbarian
- Conan the Destroyer
- Cutthroat Island
- Dracula/Castlevania: Symphony of the Night
- Dragonheart
- Dragon Quest Symphony 1-7
- Escaflowne 1-4
- Elemental Gearbolt
- Fatal Fury: The Motion Picture
- Final Fantasy 1-11, Tactics, etc.
- First Knight
- Grandia 1-2
- .hack 1-3
- Mask of Zorro
- The Mummy 1-2
- Noir 1-2
- The Phantom
- Record of Lodoss War 1-3
- Record of Lodoss War TV 1-3
- Sakura Wars
- Slayers
- Stargate
- Suikoden 1-3
- Tactics Ogre
- Treasure Hunter G
- Uncharted Waters
- Vagrant Story
- Waterworld
- Wild Arms 1-3
- Willow
- Xenogears
- Xenosaga
- Y's Symphony
- Zelda Symphony