Available today is the Modern Metal pack which let's players jam to master recordings of Deftones’ “Hole in the Earth,” Avenged Sevenfold’s “Almost Easy” and Thrice’s “The Arsonist.” The track pack is now on Xbox LIVE Marketplace for Xbox 360 and will be available later today on PS3's Playstation Store.

Additionally, Activision will be kicking off the St. Patrick’s Day celebrations with a special free track pack from the popular Celtic punk band Dropkick Murphys that will be available mid March. Straight from the band’s sixth album, The Meanest of Times, the Dropkick Murphys pack will include master recordings of “Famous for Nothing,” “(F)lannigan’s Ball” and “Johnny, I Hardly Knew Ya.” The track pack will be available for free to download on Xbox LIVE Marketplace and Playstation Store.

Guitar Hero III: Legends of Rock contains explosive new content and features including a multiplayer action-inspired battle mode, grueling boss battles, a host of exclusive unlockable content and visually stunning rock venues. Expanded online multiplayer game modes allow axe-shredders worldwide to compete head-to-head for true rock status. The game features a star-studded soundtrack including master tracks by legendary artists such as Aerosmith, Guns ‘N’ Roses, The Rolling Stones, Beastie Boys, Rage Against the Machine and Pearl Jam, as well as original songs by guitar icons Slash and Tom Morello. While continuing to retain all the key features from their prior legendary performances, fresh downloadable content will be available on multiple platforms, and players can now shred to a killer set list from many of the most popular rock songs ever recorded.

For the first time ever, Guitar Hero fans are able to thrash and burn with new wireless guitar controllers available for each platform, including exclusive Gibson Guitar's Les Paul model for the Xbox 360, Wii, and PS3. PS2 gamers also get to shred on a new exclusive shape, Gibson’s Kramer guitar, popularized by hard rockers and known for its body design, pickups, electronics and construction for furious finger fretting.

Guitar Hero III: Legends of Rock, rated “T” for Teen, is currently available at North American retailers for PS2, Wii, PS3, Xbox 360 and PC.