Diddy Kong Racing was released for the Nintendo 64 in 1997 by Rare, as a colourful kart racer built around adventure and exploration as well as racing. Within its adventure mode, collecting a key marks progress toward a locked gate and the tougher challenges beyond it, which is why the chime feels like a small reward rather than a simple pickup. As retro gaming clips spread on video platforms and soundboards, the short, clean cue became a handy shorthand for unlocking something new, and it remains popular with creators who grew up with the Nintendo 64 era.