The phrase references the acquisition of a disk image file, typically associated with software or games featuring the character Sonic the Hedgehog, without incurring a cost. The ISO format is a standard archive file format that duplicates all of the data from an optical disc, such as a CD or DVD. An example would be finding and retrieving a complete disc image file of a classic Sonic the Hedgehog game for archival or emulative purposes.
Accessing such content can provide access to older or difficult-to-find software and gaming titles, allowing individuals to experience or preserve digital heritage. Historically, the distribution of software and games has evolved from physical media to digital downloads. The ability to obtain these disk images circumvents the need for original media and corresponding physical drives. However, it is important to acknowledge that the practice can raise concerns regarding copyright infringement depending on the source and licensing terms.