Don't Knock Twice: The VR Horror / Cult Game Already Scares Me with a Trailer
When you purchase Don’t Knock Twice on PlayStation VR, HTC Vive and Osculus Rift(Steam), you will get two versions of the game, one for the VR device, and one for the non-VR gaming. The game price for these 3 platforms is $19.99. But yeah, the Xbox One doesn't provide VR support, so you get only the non-VR version which will be available for $14.99.
However if you pre-order the game now on Steam and Xbox One, you’ll receive a 20% discount which makes the Steam version for 15.99$ and the Xbox One version for 11.99$, but PlayStation VR pre-order is not available yet, so we don't know if it will get a discount or not.
Visit the Steam page to pre-order and to know more about the game.
You can watch the new trailer below: