unknown .iso files directly, as they can contain malicious content.
If this is a "New Star" game (e.g., New Star Soccer ), the .iso file is likely a disc image for a console version (PS2/PSP). Newstar Richie.iso
If this file came from a community, forum, or Discord server, check the original source for a readme.txt file or installation instructions. unknown
If you are trying to mod a game, you would generally use a tool to extract the ISO contents, modify the files, and then rebuild the ISO. unknown .iso files directly