XBLA games often default to "Trial" mode. Ensure you use a tool like XM360 on your console to scan and unlock the full version if it shows up as a demo.
Since you are looking for the XBLA version for a modified Xbox 360, keep these technical points in mind: Rock of Ages [XBLA][Arcade][Jtag/RGH]
For the console to recognize the game, it must be placed in the correct path on your Internal HDD or configured External USB: Hdd1\Content\0000000000000000\58410B07\000D0000\ XBLA games often default to "Trial" mode
XBLA games typically come as a single file with a long hexadecimal name (the Content ID). Rock of Ages [XBLA][Arcade][Jtag/RGH]