In this video, Konami producer Tomm Hulett explains the premise of the PlayStation Vita's weird spin-off game, Silent Hill: Book of Memories. "You receive a strange book. When you open it, you see your entire life story written on those pages," he said. "All your memories." You can then rewrite your memories and alter reality.
Apparently, judging by the gameplay, all the player-created characters then rewrite their lives as monster-filled nightmares -- with Hulett suggesting that even Pyramid Head shows up. In any other game, that would be weird, but it wouldn't be Silent Hill if the protagonist wasn't totally bonkers.
Speaking of gameplay, the above video features the first (early) direct-feed gameplay footage.