It looks like Kojima was able to sneak a small easter egg to honor P.T. into Phantom Pain. Some are speculating that this easter egg is proof that Kojima's Silent Hill series would have taken place in the same universe as Metal Gear. If you think about it, this idea isn't too far-fetched. Considering all of the supernatural beings that inhabit Snake's universe (i.e. The End, Psycho Mantis, Quiet, Man on Fire), I could definitely see our favorite demonic town existing on the same timeline. Maybe one of Snake's enemies would have found out about the town and tried to utilize its power in some way? It's cool to think about.

Yeah I feel the same way, which was a reason why I've been trying to wrap my head around the ingsoc.org website too much.