See no evil, hear all evil. Perception, a first-person thriller about a blind woman exploring a mysterious mansion haunted by a dark presence, is now available, DRM-free on GOG.com.Your eyes can't help you but your other senses immediately kick in: especially that of self-preservation. Stay calm and the strange mansion at Echo Bluff will be slowly revealed to you as a sharp soundscape, painstakingly created through echolocation. Every sound could be a clue. Every movement, a looming threat. Every secret, a demon for you to conquer.