Released unceremoniously in 2014 as a teaser for an unnamed horror game, the “Playable Teaser,” as it would later be known, quickly became one of the most discussed gaming experiences of the year. The premise is relatively simple but undeniably creepy. A repeating hallway that changes. Radio broadcasts reporting husbands murdering their wives and children interspersed with messages seemingly directed at the player.
Each pass through the hallway built up tension. The process made you feel like you were trapped in a Hell, possibly of your own making. Then, after you get through it all, the sink baby, Lisa, the eyes staring at you in the red light, when the door finally unlocks, you find out the whole thing was a teaser for Silent Hills and that Hideo Kojima and Guillermo Del Toro were working on it. Oh, and they were trying to get Junji Ito on board too. This is one of the “if I had three wishes” kind of scenarios for that dream team.
Source: Destructoid The Games that Defined the Decade: P.T.