"A Blind Legend" is a game developped by Dowino based on binaural audio technology... only.
Binaural audio consists in recording audio sounds in the exact same way as humans are naturally perceiving it. Listening to binaural audio may only be performed by the use of a headset, making the resulting experience hyper-realistic. Many more details may be found on the binaural recording wikipedia page.
"A Blind Legend" game was crowd-funded and is now available for free on Google Play and the App Store.