See whether you can uncover the truth in echoes: The Microchip. echoes is a co-operative audio mystery game. Using the free app, players listen to mysterious noises and voices that are connected to the playing material. Together they look for hints in the sound bites to bring the story parts in order and solve the case. In more detail, your task is to assemble the 24 parts of the story in the right order; each part is represented by an object either a game board or a card and its associated echo.