Description: [Xbox Live Arcade] Marble Blast Ultra is the latest in the classic Marble Blast series. Suitable for players of any age, Marble Blast Ultra transports you to a futuristic 'astrolab' arena suspended high in the clouds. Compete against each other by navigating your marbles through moving platforms and dangerous hazards, while collecting rare gems and power-up enhancements, in an effort to complete each course in record time. Compete head to head in Xbox Live ultra blast multiplayer mode. [Xbox.com]