Why is there no Metal genre?

Rock, Alternative Rock, Hard Rock





Trivium, All That Remains, Atreyu, Red, Killswitch Engage, Rise Against, Five Finger Death Punch, Papa Roach, Seether, Sevendust, Bullet for My Valentine, Crossfade, Godsmack, Nonpoint, 30 Seconds to Mars, Coal Chamber, Shadows Fall, Mudvayne, Spineshank, (hed) p.e., Blindside, Linkin Park, Breaking Benjamin, A Perfect Circle, Chevelle, Deftones, Disturbed, Avenged Sevenfold, Atmosphere, Immortal Technique, Rehab, Deltron 3030, Drowning Pool, Evanescence, Static-X, Everlast, Faktion, Hollywood Undead, Norma Jean, Incubus, Kittie, Otep, Limp Bizkit, Skindred, American Head Charge

To the Pain, End of Silence, Shogun (CD/DVD), Crossfade