When Microsoft officially sold Resident Evil 4 on the Xbox 360 Marketplace, it was sold as a "Games on Demand" title. These files are not standard ISOs. They are folder structures stored in Content\0000000000000000\.
An ISO file (or ISO image) is a digital replica of an optical disc—in this case, an Xbox 360 DVD-ROM. It contains every folder, file, and sector of the original game disc. When you download an ISO of Resident Evil 4, you are downloading a perfect 1:1 copy of the retail game. iso resident evil 4 xbox 360
For the Xbox 360, ISOs are essential for: When Microsoft officially sold Resident Evil 4 on
This version includes the main campaign and the extra content that was added in later releases: iso resident evil 4 xbox 360