Activision is sponsoring the Guitar Hero III Rock Your Party contest over the Super Bowl weekend, with more than 900 prize packages to be given away to aspiring rock monsters.

After registering their gamer tags, players will automatically receive a sweepstakes ballot every hour when they play a multiplayer Guitar Hero III session over Xbox Live between 12:01 a.m. on February 1 to 11:59 p.m. on February 3. Xbox Live Gold members can also sign up by downloading the free “Rock Your Party” gamer picture from Xbox Live Marketpace.

At stake in this legendary rockfest are 936 hourly prize packages of a custom Red Flames Guitar Hero Guitar strap and 500 Microsoft Points, five Third Prize Packages of an Activision Xbox 360 Game Pack, five Second Prize Packages including the Activision Xbox 360 Game Pack, 4000 Microsoft Points and an Xbox 360 face plate signed by Slash, and one Grand Prize of an Xbox 360 Elite, a 50-inch LG 1080p plasma television, a Boomchair and 4,000 Microsoft Points.

Complete Rock Your Party rules are available here, and links to registration, prizes and other information can be found at the Guitar Hero III Rock Your Party contest website.

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