Videos Subscribe to Pocket Gamer on Prepare to be scared witless in this new Knock-knock teaser trailer By Chris Priestman | Feb 14, 2014 iOS | Knock-Knock Twitter Facebook Reddit Chris Priestman Twitter Anything eccentric, macabre, or just plain weird, is what Chris is all about. He turns the spotlight on the games that fly under the radar. Next Up : Rob Riches - gameplay video