For the best experience, the file must be an authentic, unedited copy of the original Sega Genesis/Mega Drive ROM.
wasn't just one game; it was a physical feat of engineering. To get the full experience, you had to physically "lock" the cartridge into the top of the Sonic & Knuckles cartridge. In the digital world, sonicknuckleswsonic3.bin sonicknuckleswsonic3bin extra quality
in the emulation scene means: