Epilogue’s Operator devices are allowing owners of classic Nintendo cartridges to rescue ageing save files and play their original Game Boy and Super Nintendo games on modern computers, phones and handhelds.
The Romanian company’s GB Operator, priced at $50, supports Game Boy, Game Boy Color and Game Boy Advance cartridges. Its newer $60 SN Operator is designed for Super Nintendo and Japanese Super Famicom games, with an N64 model also in development.
Both products connect to a Windows PC, Mac or compatible device using USB-C. They can read the game data from a physical cartridge, back up saved progress and, in supported games, write those saves back to the cartridge.
That offers a potential lifeline for games released more than two decades ago. Many Nintendo cartridges used small watch batteries to preserve saved games, and those batteries are now reaching the end of their useful lives.
When a battery fails, the game itself may remain playable but the stored progress can disappear. Pokémon Pinball, The Legend of Zelda: Link’s Awakening and other classic titles are among the games vulnerable to the problem, while the real-time clocks in Pokémon Gold, Silver and Crystal placed additional demands on their batteries.
The Operators are not miniature Super Nintendo or Game Boy consoles. They contain neither original Nintendo hardware nor an FPGA. Instead, the device transfers a copy of the cartridge’s ROM to a connected computer, where it is run through an emulator.
Epilogue’s Playback software is intended to make the process straightforward: insert the Operator, add a cartridge and select play. Saved progress can be synchronised with the physical game, meaning a player could continue on a PC, move the cartridge to a Steam Deck and later use it in an original console.
The system also brings older games to hardware that was never designed to accept them. A Game Boy cartridge can be played on a Steam Deck, while SNES titles can be run on an Xbox Ally or another compatible handheld. With suitable mounts and magnetic accessories, the devices can even be attached to a phone.
There are further conveniences for players willing to use standard emulator features. Depending on the selected emulator core, users can access save states, rewind functions and RetroAchievements, although those options may not automatically preserve progress on the cartridge itself.
Game Boy and SNES cartridges face compatibility limits
Testing has exposed some shortcomings. The Operators can be less tolerant than original Nintendo hardware when cartridges are dirty, worn or slightly damaged, with games sometimes losing connection if a cartridge is moved.
They do not support multi-game flash cartridges or the Super Game Boy accessory. Epilogue’s advertised counterfeit-cartridge detection has also proved unreliable in testing, while the company’s Game Boy Camera webcam feature works largely by capturing the game’s display through software rather than turning the camera into a conventional webcam.
The products are housed in transparent polycarbonate cases, with their circuit boards visible through the minimalist design. The hardware can also support unusual uses, including playing games such as Mario Paint or Metal Combat: Falcon’s Revenge without needing an original SNES Mouse or Super Scope.
Epilogue has contributed funding and code to open-source emulator projects and has worked with the developers of Delta Emulator to support real cartridges on phones. It has also developed a Flashback app aimed at turning a phone into a Game Boy Camera display.
According to the company, every SN Operator is factory-calibrated using satellite time signals to ensure the correct clock speed when reading certain SNES games. Epilogue co-founder Petru Sebastian Toader has also developed a CRT-style display filter for the Playback software, while the company is working on online multiplayer.
For owners of ageing cartridges, the most important feature remains the ability to make a copy of a save before its battery fails. Once a replacement battery has been fitted, the backed-up progress can be restored, preserving a link between modern emulation and original Nintendo hardware.
