Epilogue’s USB-C Readers Bring Old Nintendo Cartridges to Modern Devices

The GB Operator is a transparent trapezoidal cartridge reader that writes to and reads genuine Game Boy, Game Boy Color and Game Boy Advance cartridges over a USB-C cable. The newer SN Operator does the same for Super Nintendo and Japanese Super Famicom titles. Epilogue also has a Nintendo 64 version in development.

The review said the devices do not contain original Nintendo chips or FPGAs. Instead, when a cartridge is played, the ROM is saved to the host computer and run in an emulator. Epilogue’s Playback software simplifies the process: connect the reader, insert a cartridge and press play. Save data is automatically written back to the cartridge, and removing the cartridge makes the game close immediately.

That design makes it possible to start a game on a PC, move the same cartridge to a Steam Deck, and later put it into an original Game Boy or Super Nintendo to continue. Optional emulator features include RetroAchievements, save states and rewind. The review also described using an SN Operator to convert a save from the Super Famicom Classic Edition’s version of Super Metroid and write it to a physical Japanese Super Metroid cartridge, which then ran on original Nintendo hardware. For games that once needed a Super Scope light gun or SNES Mouse, the reader lets a PC mouse or controller stand in for those peripherals.

The report said Epilogue’s hardware is high quality for the price, with transparent polycarbonate shells and visible minimalist circuit boards. It also noted Epilogue, a Romanian company, contributes money and code to open-source emulator projects, has worked with the developers of Delta Emulator, and offers a Flashback app that can turn a phone into a Game Boy Camera. Co-founder Petru Sebastian Toader told The Verge that he wrote the software’s CRT filter, that the company is working on online multiplayer, and that every SN Operator has its clock speed factory-calibrated using satellites to avoid errors when dumping certain Super Nintendo games.

The review also cautioned that Epilogue’s readers can be less tolerant than original consoles when cartridges are dirty or damaged. Some cartridges in the test quit mid-session when nudged, and the review said Epilogue should be more upfront about these compromises on its product pages.

Editor’s Summary: Epilogue’s GB Operator and SN Operator offer cartridge collectors a way to connect aging Nintendo games to modern devices for playback, ROM backup and save-file transfer. The review emphasizes their ability to write saves back to physical cartridges, while noting that dirty or damaged cartridges can be a constraint.