Long before modern "Season Passes," Sega used physical hardware to expand a game's universe. When you run a Sonic_3_and_Knuckles.bin file, you are essentially playing the first major expansion pack in gaming history. The Sound of Controversy
While the individual games have occasionally been delisted from digital storefronts, the most reliable way to get this file is through your own Steam library: sonicknuckleswsonic3bin file
As the investigation into the sonicknuckleswsonic3bin file continues, future research directions may include: Long before modern "Season Passes," Sega used physical