The irony of the SourceNext release is that while it fixed hardware compatibility, it introduced a software fortress. Unlike the Western releases, which used relatively standard (and easily circumvented) CD checks of the late 90s, the SourceNext version utilized a more robust form of copy protection, likely a variant of or a proprietary Japanese locking mechanism.
Not everyone wants to wrestle with 20-year-old DRM. Here are superior alternatives that require no key:
Before diving into keys, you must understand the software. SourceNext was a Japanese publishing company (now part of Phoenix Entertainment) that specialized in porting popular games to the Japanese PC market.
The Sourcenext release was a physical product that came in a yellow DVD case. Inside, alongside the manual, was a slip of paper containing a unique 16-digit CD-key
When Resident Evil 2 was ported to the PC in the late 90s, it was handled by different publishers in different regions. The Western releases, published by Capcom and Virgin Interactive, were decent for the time but suffered from the limitations of early Windows APIs. They relied on old codecs, had resolution caps, and often struggled with compatibility on newer versions of Windows (XP, Vista, and beyond).
A: Licensing issues with SourceNext, plus the source code for the PC port is reportedly lost or too costly to update.