The term refers to acquiring a disc image file, specifically an ISO, of the video game Sonic Unleashed for the Xbox 360 console. This typically involves downloading the file from an online source, enabling users to play the game without possessing the original physical disc, often through emulation or modification of the console.
The appeal often stems from convenience, preservation, or circumventing purchasing costs. Digitally preserving game content ensures its availability despite potential obsolescence of physical media. However, distributing or obtaining game ISOs without owning the original game constitutes copyright infringement in most jurisdictions.