This is the hidden gem. The V101 ISO works as a region-free boot disc. If you have a Japanese PS2 and an American game, booting this ISO first forces the console into a developer-like mode, allowing cross-region play. This feature was patched out in later commercial releases.

The V101 ISO Exclusive is powerful, but it is an unofficial beta. Users have reported specific bugs:

Always use a spare, empty memory card when testing new codes.

The V10.1 ISO has known compatibility issues with the PlayStation 2 "Slim" models (specifically the 90000 series) which removed the internal power supply for the USB ports in standby mode, sometimes preventing the USB drive from being read during the boot process. This reinforces the "exclusive" nature of the software, as it is best experienced on original "Phat" (1xxx-5xxxx) models.

Because the official support ended, the "exclusive" nature of the ISO has shifted to community-modified versions. Modders have taken the V10.1 ELF (executable) and injected updated code lists for games released late in the PS2 lifecycle (e.g., God of War II, Final Fantasy XII International).

During the PS2 lifecycle, cheat devices were updated annually to include new game codes and updated encryption keys. The Version 10 (V10) series marked a significant milestone as it was one of the final major revisions released physically to retail. Within the modding community, specific ISO backups of these discs are treated as "exclusive" or "rare" because:

The "Codebreaker v101 iso exclusive" is abandonware. Pelican (the original manufacturer) went defunct in 2010. No one currently holds the rights to sell this software.

From a legal standpoint:

If you are a purist, search for the original physical disc. But be prepared to pay $150–$300 on eBay for a legitimate "Not for Resale" V101 disc.