Dedicated archival sites like the Lost Media Wiki and Unseen64 still list Resident Evil 0 for the N64 as a lost item. While emulators exist that could theoretically run the code, the core issue is simple physics: the physical cartridges—or the digital dumps of those cartridges—have never been located. It remains a "phantom" ROM: we have seen the screenshots, watched the shaky-cam footage of its public demo, and poured over the developer diaries, but the actual file data remains locked away, likely in a private collector’s vault or a forgotten Capcom server.
Initially, Resident Evil 0 was developed for the PlayStation, but due to the console's limitations and the desire for a more immersive experience, the team decided to shift development to the Nintendo 64. This move allowed for the use of 3D graphics and a more expansive game world. Resident Evil 0 N64 Prototype Rom
The N64 prototype was significantly different in its presentation and certain mechanical nuances: Dedicated archival sites like the Lost Media Wiki