A mysterious new horror game for PlayStation 4 called P.T. was just announced at Gamescom and you can try it now. Alongside the game's announcement, Sony and developer 7780s Studio released a demo for P.T., which they describe as "the world's first interactive teaser."
You can download the cryptic P.T. teaser — a 1.3 GB download — from the PlayStation Store starting today.
Update: Surprise! P.T. is a "playable teaser" for the next Silent Hill game, which is being led by Hideo Kojima and Guillermo del Toro.