To use VPK files, your PlayStation Vita must be running custom firmware (such as HENkaku or permanent firmware like Enso). Once your console is modded, follow these steps to install your files: Step 1: Transfer the VPK to Your Vita Launch on your PS Vita.
In VitaShell, navigate to the VPK file and press to install it. ps vita roms vpk exclusive
The Vita has a massive community that "ports" games from other systems (mostly Android/PC): To use VPK files, your PlayStation Vita must