TouchArcade: RAC7 Games just put out a curious new title that is designed around using sound to help navigate your way through dangerous rooms and tunnels, called Dark Echo [$1.99]. How it works is that you tap and hold in a direction to walk that way, with each step creating sound waves which are visualized in the game world. As such, it's not really sound-exclusive, but positional audio does play a role in pointing out to you where walls and threats are located. And yes, there are threats. Enemies will chase you down, and there are sections that can kill you, indicated by their red color-coding. Items like keys are colored gold, and other elements get involved over time.
Touch, Tap, Play writes: "Everybody knows about Clash of Clans, Candy Crush Saga and most of the games that have topped the Apple Store charts in 2015. However, you probably never heard of Oddwings Escape, Quetzalcoatl and other games on our list. However, even though these were not the chart toppers they deserved to be, 2016 might be the time for their second chance – and your second chance to try out these lesser known iOS games everybody should be playing!"
Games Reviewer reviews Dark Echo from RAC7 Games. It is a well-designed puzzle game that hit the right notes.
Pocket Gamer: If you're looking to crap your pants but not willing to pay for the experience, listen up.