Since you are looking for the XBLA version for a modified Xbox 360, keep these technical points in mind:
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\ Rock of Ages [XBLA][Arcade][Jtag/RGH]
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
Roll your boulder down a hill, dodge enemy defenses, and smash through the gates of your opponent's castle to crush them. Between rolling phases, you place obstacles like towers,
Between rolling phases, you place obstacles like towers, cows, and catapults to stop your opponent's boulder from doing the same to you. Technical Setup for Jtag/RGH
The game is famous for its art style and humor. Each level begins with a hilarious cutscene parodying historical figures or myths using paper-cutout animations. It's an excellent "pick-up-and-play" title that works great in local split-screen multiplayer.