When pausing and then unpausing the game (- button), there is a rare chance that you will trigger a creepy pale face/mask to appear for a brief second. A mask that vaguely bears a resemblance to the one on the title artwork. The first three Project Zero (Fatal Frame) games were known for their idle scares, where you would trigger a creepy effect (i.e bloody hands or a static screen), after leaving the game idle for 5-10 minutes. This Easter egg however triggers at complete random, and you can thus go a whole regular playthrough and not encounter it once.