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U.D.O. U.D.O. UFO Ugly Tree Ulcus Ulver Ulver Unanimated Unanimated Unanimated [House of Kicks] Unauthorized Unchaste Uncle Meat Undebatable Ground Undercroft UndersounD Undertakers Unevil Hopes Unexpect Ungod Ungod Unhola Unholy [official] Unholy The Unholy Unholy Massacre Unlord [Displeased] Unlord Unmoored Unpure [Napalm Records] Unsanctified Unscarred Unsilence Unterwelt Untoten Uranium235 Urban Assault Urgehal Urgrund Uriah Heep [official] Uriah Heep Urolagnia Usurper Utopia Banished Uttervoid Utumno Utumno