Players have a double bass option on drums for the difficult and expert levels, which can be enabled by using a splitter and an additional pedal for the kick drum. In addition, all of the songs will be "unlocked" from the beginning of the game as opposed to them not being available until players reach certain levels, as in previous versions of "Guitar Hero."

"It was time to change it up a bit," Neversoft lead designer Alan Flores says. "Guitar Hero: Metallica" will be available for Wii, Xbox 360 and PlayStation 2. Aerosmith was the first artist to star in its own version of the game, which was released last summer. - More details

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