There is an official Mafia II mobile game from 2010… but it was a for flip phones, not a PSP ISO. You can run it on a J2ME emulator, but it is a 2D side-scroller or top-down shooter, not the open-world 3D experience.
Be very cautious downloading "Full ISO" files for games that didn't exist on that platform, as they often contain malware or fake surveys. mafia 2 ppsspp iso file download full
Never complete a survey to unlock a download link. There is an official Mafia II mobile game