A Super Mario 64 creator has discovered a hidden sound effect that plays only after the game is left running continuously for over a year.

That includes a hidden sound effect that only partially plays in the normal course of the game, which you can only hear fully by letting the game run for 14 months straight.

Super Mario 64 is one of those classic sorts of games that, almost 30 since its release, is still giving up delightful little secrets. This time around, and as reported by GamesRadar, it's a ...

Nintendo's landmark 3D platformer Super Mario 64 ushered in a new paradigm of video game sound design, and unparalleled immersion for its time.

It turns out Amnesia: The Bunker has been quietly stressing players out using a well-known sound illusion employed in scary movies as well as Super Mario 64 to create suspense.