The Xbox 360 was heavily region-locked. Many great Japanese shooters (shmups) and RPGs never left Japan. RGH removes the region lock, allowing you to play imports like Deathsmiles or Tales of Vesperia (JP) on an NTSC-U/PAL console.
The Xbox 360 is a surprisingly capable emulation box. With RGH, you can run RetroArch or standalone emulators: xbox 360 games rgh
This application runs in the background and applies patches to your console. It is essential for: The Xbox 360 was heavily region-locked
RGH exploits a timing vulnerability in the Xbox 360’s CPU reset signal. By glitching the reset line at a precise moment, the console boots into a state where signature checks are disabled. Once RGH is installed (requiring soldering a small glitch chip like Coolrunner or Matrix), the console runs a custom dashboard (e.g., FreeStyle Dash, Aurora) from its hard drive, enabling full control over system software. RGH exploits a timing vulnerability in the Xbox
Note: RGH is distinct from JTAG (an earlier exploit patched in 2009). RGH works on all Xbox 360 models (Phat, Slim, E) with varying difficulty.
You cannot talk about RGH content without mentioning Streets of Rage Remake (Sorr).
This is a fan-made game that combines all levels from Streets of Rage 1, 2, and 3, plus 19 brand new levels, new music, and a ridiculous roster of characters. It was originally a PC game, but it has been ported perfectly to Xbox 360 XEX format. It is often cited as the single best piece of homebrew content available on the system.