The sound comes from Sony's PlayStation Portable, the handheld console first released in Japan in 2004 and in North America and Europe the following year. It played every time the system booted, becoming inseparable from the experience of opening the sliding screen and loading a game from a UMD disc. As the PSP gained a loyal following for titles like Grand Theft Auto: Liberty City Stories and Monster Hunter, the chime spread through gameplay videos, unboxings, and emulation streams. Today it remains a shorthand for mid-2000s portable gaming and is widely reused in nostalgia content.