The terror of Perception, a first-person horror game currently raising funds on Kickstarter, is that entire world around you appears to be hewn from stone. What chance do you stand in a universe where everything is so unnervingly solid? The manor in which Perception is set is not actually hewn from stone; it just feels that way. You play as Cassie, a blind young woman with an extraordinarily attuned sense of hearing. By default, the screen is pitch black, but every step you take sends sound waves reverberating around you, which bounce back at variable speeds to provide a brief…