Unexplored Game Mechanics That Feel Like They're Hiding Something

I’ve always been fascinated by game mechanics that seem to hint at more than what’s on the surface. One that comes to mind is the subtle audio cues in certain horror games, where specific environmental sounds or distorted whispers aren’t just for atmosphere they sometimes feel like they’re guiding you toward hidden areas or events. As someone who dabbles in sound editing, I pick up on these details, but I’m never quite sure if I’m just overthinking or if there’s a genuine secret waiting to be uncovered. Have you ever stumbled across a mechanic like that, where you’re convinced there’s a deeper layer the developers tucked away? What did you do to try and unravel it, or did it remain a mystery?