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 ...