The Internet Archive hosts many legal backups of abandonware. Search for "Terraria Xbox 360 RGH Ready" and look for files uploaded by "ModdedMasters" or "Digiex." These typically come in format—just drag and drop to your HDD1:\Content\ folder.
Game files come in various formats. For an RGH console, the two most compatible formats are (Games on Demand) and XEX (extracted file format). If you downloaded a disc image backup in .ISO format, you must convert it using your PC. terraria xbox 360 rgh download verified
Downloading or distributing modified Xbox 360 game files (including “RGH”/jtag builds) that bypass platform protections is illegal in many places and violates Microsoft’s terms of service. I’ll explain the technical context, risks, and legal/ethical considerations so you can make an informed decision. The Internet Archive hosts many legal backups of abandonware