
I usually don't play a lot of computer games. But I was looking to get hold of REZ. It was released for the Playstation 2 and the Sega Dreamcast. I have the Sega version.
This game is a simple shooter, just destroy everything that's moving. The story behind that game can be told in a few words: a big computer system has gone mad, someone has to stop it! What makes this game outstanding is obviously not the story, but the fusion of gameplay, sounds and visuals:
Every sound in Rez such as the sound effects of the laser beam or the sound of locking on to a target is programmed to instantly synchronize with the background music. Even if the player mistakenly pushes a button, that sound will also join the other sounds produced by the game in perfect harmony.
All this will happen by simply controlling the player character. The music will dramatically change in tune and rhythms all during the game, which is just like remixing the music in your original way every time you play Rez. In order to further this effect we have asked various artists of club music to join the production of Rez.
The music is very simple techno/trance. Coldcut are also involved, but I can't imagine what sound effects they did, but i haven't finished the game yet (I'm stuck at the third boss).

Take a look at the REZ - webpage for more information on the involved artits, more pictures and even some videoclips of REZ live performances.
Read a review of REZ in german or english