The last step in every mod is testing, and probably something about region locks if the title of this post is to be believed. The important distinction is that the Phantom handles disc authentication, not the Saturn’s separate region lock, so imports still need their own region-bypass method.

We’ll have another model of Saturn being modded in the future, so stay tuned for that madness. Bad_Ad84’s Retro Gamer Stuff store later closed, so the old store link is preserved here for historical context rather than as somewhere you can still buy the chip.

The Phantom story later continued in Installation of the Sega Saturn Phantom Universal Modchip and Sega Saturn Phantom Universal Modchip - Testing, Testing!.

Sources

• Sega Saturn Shiro - Saturn optical disc authentication and modding context
• Pseudo Saturn Kai