What defines the genre of anomaly horror games?

What makes anomaly horror games special is that something unexpected happens, and it's usually scary.

Imagine you're playing a game where everything feels normal at first. You’re walking through your favorite park, or maybe even in your own house. But then, out of nowhere, the ground opens up and swallows the path right under your feet! That’s like anomaly horror, something strange happens that breaks the rules of what you expect.

In these games, the scary part is often not a monster or a ghost. Instead, it's how things change. Like when you're in your room and suddenly everything starts to twist around you, or the walls move like they’re alive. That’s the anomaly, it messes up what you know.

It feels really creepy because it happens without warning, just like how sometimes your favorite toy might break right when you're about to play with it. The unexpectedness is what makes it spooky and keeps you on edge.