The -w in the filename suggests it may come from a or “working” build configuration — possibly one that includes debug symbols or is intended for use with an emulator’s debugger.
The name breaks down as:
If you’d like, I can:
The Wai prototype is famous for containing hidden levels (Genocide City, Wood Zone) and different physics logic. In this specific .68k file, one would expect to find: sonic2-w.68k
Located in the uncompressed ROMs folder of the SEGA Mega Drive & Genesis Classics installation directory. The -w in the filename suggests it may