What is P.T. Silent Hills?
P.T., short for Playable Teaser, is a first-person psychological survival horror video game developed by Kojima Productions under the fake pseudonym "7780s Studio", and published by Konami.
P.T. served primarily as an interactive teaser for the game Silent Hills, a cancelled installment in the Silent Hill series. After the cancellation, Konami removed P.T. from the PlayStation Store and eliminated re-installing the game, a decision that later spawned criticism and fan efforts to allow P.T. to be re-downloaded.
Originally P.T. was released for the PlayStation 4 exclusively on 12 August 2014 as a free download on the PlayStation Network, following news of the cancellation of Silent Hills, it was announced that P.T. would be removed from the PlayStation Network on 29 April 2015.
Originally, it was reported that the demo could be re-downloaded, but in May 2015 it was no longer re-downloadable from the PlayStation Store. What we have here is the PKG for the P.T. Silent Hills Demo on the PS4, both the USA and EUR demo.
It's not currently possible to install this on a PS4 which has not already downloaded the P.T. Silent Hills demo, however when the PS4 is eventually hacked to the point where installing PKG files is possible people will be able to install P.T. Silent Hills once again.