The Pinball Arcade -xbla--arcade--jtag Rgh-

For users with modified consoles, JTAG and RGH systems offer a way to keep this extensive library alive. These modifications allow the hardware to run unsigned code and bypass the digital rights management (DRM) that typically locks delisted content.

(Joint Test Action Group) and RGH (Reset Glitch Hack) allow a console to run unsigned code, homebrew software, and games directly from a hard drive without needing a disc or an official license from the Xbox Store.