Use ZArchiver or any file manager to extract the .ISO or .CSO file from the ZIP archive.
Please keep in mind that I'm providing general guidance and not directly endorsing or promoting any specific downloads or websites.
To play legitimate PSP titles on your device, follow these steps: Download the Emulator : Get the official PPSSPP Emulator for Android, iOS, or Windows. Prepare Your Game File
was released for the PS Vita, but it is a distinct game from Black Ops II What "Black Ops 2 PPSSPP" Files Actually Are Downloads labeled as Black Ops 2 for PPSSPP are usually one of the following: Call of Duty®: Black Ops II on Steam