The preservation and performance of retro gaming have undergone a significant transformation with the introduction of the format. Traditionally, PlayStation 2 enthusiasts relied on standard ISO files—uncompressed digital replicas of game discs—which, while accurate, often occupied massive amounts of storage. As modern hardware and homebrew software like Open PS2 Loader (OPL) evolved, the need for a more efficient storage solution became paramount, leading to the adoption of ZSO as a successor to older formats like CSO. The Technical Edge: Why ZSO?