Xbox 360 discs utilize a proprietary file system (XGD - Xbox Game Disc). While similar to standard ISO 9660/UDF formats, the Xbox 360 employs a specific partitioning scheme:
Retail Xbox 360 games were typically region-locked, meaning a game purchased in North America (NTSC-U) would not function on a console from Europe (PAL) or Japan (NTSC-J). However, the Xbox 360's security architecture allowed for the signing of "Region Free" titles, often distributed digitally via XBLA or, in rare cases, pressed onto retail discs. Capcom Digital Collection -Region Free--ISO-
