WASDUk Reviews Knock Knock;
"Most horror titles will make you jump. A few might make you a little uneasy for a moment or two. But the great ones get right under your skin. After you’re done they make you want to turn all the lights in the house on to make sure the monsters in the dark can’t get you. When I went to bed after finishing Knock-Knock I wanted to leave the bedroom light on, and maybe the one in the hall. Just in case."