Development of Resident Evil 0 began in 1998, shortly after the massive success of Resident Evil 2 . Originally conceived by Capcom Production Studio 3, the project was intended to be a prequel that explored the origins of the T-Virus and the fate of the S.T.A.R.S. Bravo Team.

Though much of the story remained intact for the final release, the N64 prototype featured several notable differences:

Capcom initially targeted the (Disk Drive) add-on due to its high storage capacity. However, when the 64DD failed commercially, development pivoted to a standard 64MB cartridge . This transition was ambitious; the team utilized the cartridge's fast access speeds to implement the signature "Partner Zapping" system, which allowed players to switch characters instantly—a feat that would have required significant loading on CD-based systems like the PlayStation. Key Prototype Features and Differences

The is one of the most legendary "lost" artifacts in survival horror history. While the final game eventually became a centerpiece of the Nintendo GameCube's library, its origins on the Nintendo 64 represent a fascinating alternate timeline for the franchise. The History of Resident Evil Zero on N64