Chillingham is an audio game for the PC designed for the blind and visually impaired. Created by Bavisoft and published 2004, Chillingham is/was part of the Game On exhibition showing at museums around the world. A sequel, called Chillingham 2 has also been announced, but as of 2017 has not been published.
References
Chillingham (game) Wikipedia(Text) CC BY-SA