To understand Xbox 360 ISOs, you must understand the two primary disc formats used during the console's lifespan:
An (or .iso file) is a complete, sector-by-sector digital copy of an optical disc (DVD or CD). In the context of the Xbox 360, an ISO is a direct rip of a game DVD, containing all game data, file structures, security sectors, and the unique Xbox 360 disc header . isos xbox360
Courts have ruled that making backup copies of video games is not a fair use if it requires breaking DRM (see MDY Industries v. Blizzard ). To understand Xbox 360 ISOs, you must understand
ISO2GOD (Windows PC software)
Best for JTAG/RGH consoles. Games appear in the official "Games Library" menu. To understand Xbox 360 ISOs
