This is not technically a DLC, but is essential. Retail users had to grind for Red Rings to unlock Super Sonic. The TU4 mod for RGH activates Super Sonic for all stages immediately and unlocks all stages on the map screen.
The fascination with JTAG/RGH DLC lies in the preservation and customization of the game. For many, it wasn't just about playing new levels; it was about the technical hurdle of getting high-quality assets to run on 2005-era hardware. Utilizing tools like 360 Content Manager Generations Sonic -Jtag RGH DLC-
: Use a FAT32-formatted USB drive or FTP (via tools like Aurora ) to move the DLC container file into the 00000002 subfolder. This is not technically a DLC, but is essential