A Game without Graphics
From: Computer Power User - 01/2012 - page 12

Two developers named Aaron Rasmussen and Mike Astolfi are working on a game
called "BlindSide" that consists entirely of sound. They're calling BlindSide
"The Audio Adventure Video Game," and its premise is that a young couple
named Case and Dawn wake up blind and find that the darkness is inhabited by
monsters that are eating people. You play as Case, and must use audio clues
to keep yourself and your SO alive. You can find out more about this unique
project at its Kickstarter page, where Aaron and Mike are working to fund
completion of their project via pledges from interested parties. 

BlindSide Kickstarter webpage:
http://www.kickstarter.com/projects/600219258/blindside-the-audio-adventure-video-game