The file extension .nsp (Nintendo Submission Package) is a standard format for Nintendo Switch game files. Installing these manually requires a using custom firmware like Atmosphere . Method 1: Using Goldleaf (SD Card)
: Create an NSPs folder on the root of your SD card and move your Deadly Fighter 2.nsp file there. Deadly Fighter 2 [01007E400ECC6000][v0][US].nsp...
: Unlock, buy, and upgrade various boosts to enhance your fighter's performance. The file extension
: Choose from a roster of fighters to enter combat sequences. Deadly Fighter 2 [01007E400ECC6000][v0][US].nsp...
: On your Switch, hold the R button while launching any game to enter the Homebrew Menu in full RAM mode.