Agrip created the popular fps audio quake from 2004 to 2007. Their site has since been abandoned, and future development of the game is unlikely.
Audio quake is available for download in both installer and zip formats.
In order to play it, you will need to also install quake itself.
We have two versions, 0.3 and 0.3.0.1, available.
Audio Quake originally contained multiplayer content. Because the website is down, we have not flagged the game as such.
You may still be able to set up and run your own servers, however.