"Creepy atmosphere" refers to a feeling of unease, discomfort, or fear in a particular environment or situation. It often includes elements like darkness, a lack of noise, or the presence of something unsettling or mysterious. Full definition
There is a real threat at play, with a genuinely creepy atmosphere, that is just alien enough — and yet just familiar enough — to be deeply unsettling. (thedigitalbits.com)
Inside, on the other hand, has the same creepy atmosphere and similarly is centered around a boy escaping from an unknown evil and soon encounters a much more supernatural and mysterious terror. (thexboxhub.com)
And the old mansion that serves as the game's setting gives off an appropriately creepy atmosphere. (wizarddojo.com)