It’s possible that you’d forgotten entirely about P.T. The game was originally conceived as a concept demo, or “interactive trailer” for a new addition in the Silent Hill series by Hideo Kojima. Dead terrifying, the short playable teaser made a huge impact on the Internet when it was initially released... only for it to be wiped from PSN after the project was cancelled. Virtually wiped from existence, P.T. has seen a revival on PC thanks to the work of some dedicated fans. They have already managed to produce two free to play demos. Be sure to download it now, just in case Sony decides to interfere and shut it down!