Konami has now officially removed P.T. from the PSN, but that doesn’t mean you’ll never get to play it again. If you already downloaded it once, you can go to your library and download it again, even if you deleted it. This has been tried by many people and confirmed to work every time. So feel free to delete and redownload this game as much as you like.
That being said, the people who spent $1800 on a PS4 with P.T. on it must feel really stupid now.
Unfortunately, if you did not download P.T. when it was available for free, you are completely out of luck. You cannot transfer the game in any way, and there is no way to get it from this point onward. So that will probably increase the price of a PS4 a little bit, just not to $1800.
Source: Game Informer