Hatsune Miku: Project DIVA Mega Mix is the first entry in the celebrated Vocaloid rhythm series to land on the Nintendo Switch, bringing over 100 tracks and a fresh "toon-shaded" art style to the hybrid console. While the specific string you referenced—"-NSP--US--Up..."—appears to be a technical file naming convention common in digital backups (NSP being the Switch's native file format), it refers to the US English digital version of the game along with its latest Key Features of the Mega Mix Experience
The US NSP of Hatsune Miku: Project DIVA Mega Mix is not a magic key to free games – it’s a format for backups and homebrew. Respect the developers, buy the game, and enjoy Miku’s 100+ tracks wherever you go. Hatsune Miku Project DIVA Mega Mix -NSP--US--Up...
: Bundle 1 includes Song Packs 1-6, adding tracks like "Double Lariat" and "Roshin Yukai". Mega Mix+ (PC) Hatsune Miku: Project DIVA Mega Mix is the
: An exclusive motion-control mode where players tilt the Joy-Cons to move two paddles ("catchers") on the screen, hitting notes with the ZL and ZR triggers. : Bundle 1 includes Song Packs 1-6, adding
