Dead Silence by Zearoh, Elliot Aubrey, JHawk

About

Escape the dark railway tunnel before the spirit beast finds you. A routine train ride ended in disaster when the carriages toppled deep below the city. You are trapped underground, surrounded by silence and dripping steel. The only tool you have is a handheld sonar that flashes edges of the tunnel in bursts of sound. But something else moves in the dark, drawn to every echo you make. Each click could guide you to safety or straight into its grasp