If you’re not yet familiar with the P.T. “interactive teaser” released during Gamescom last week, it was used to trick us all into thinking we were getting a brand new horror IP, when it really ended up being a clever reveal of Silent Hills. Hideo Kojima was behind it, naturally, and unless you’ve gotten some hands-on time with it, you might not be fully aware of how frustratingly difficult it can be.

The demo covers a single L-shaped hallway and a bathroom, yet somehow, the team that made it was able to transform that simple environment into something that’s both familiar, yet at the same time terrifying and unpredictable. It can be downloaded from the PlayStation Store, takes a little over an hour to complete, and wastes nary a second with hand-holding.

The game is brimming with challenging puzzles, with many of them requiring a near-superhuman level of attention to detail to solve.

There’s one puzzle in particular that waits at the end of the demo, long after the wills of even the bravest of gamers have been broken. The puzzle was solved within hours of the demo’s release, but until now we’ve had no idea how.

If you’ve been having trouble solving the final puzzle, YouTuber TheGrateDebate has you covered in a video that goes super in-depth in solving the puzzle once and for all. It sounds like coming up with the solution was a group effort, and requires the player to do a number of things. I can’t say I fully get this, but I do know that solving it has something to do with a clock alarm and taking the time to listen to a certain number of baby laughs.

For more Silent Hills, check out our list of reasons why this game has us so excited!