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Some of the lyrics are silently borrowed from other sources. One in Their Pride, an industrial-oriented track, is built around various Apollo samples. The album has a more classic heavy metal style within the songs with elements of industrial, classical, gothic rock and doom metal.
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However, it does have the recurring symphonic elements found on previous albums. The album is vastly different from the band's previous work which cemented its late 1980s avant-garde metal term it is also a departure from the style found on the band's previous albums, Morbid Tales and To Mega Therion that Celtic Frost had become known for. The album is more varied than Celtic Frost's past LPs, with unlikely covers ( Wall of Voodoo's " Mexican Radio"), emotionally charged love songs, the album's recurring industrial-influenced rhythmic songs of demons and destruction, traditional Frost-styled songs about dreams and fear, and a dark, classical piece with female vocals. It is the first album to feature bassist and backing vocalist Martin Eric Ain, who appeared on 1984's Morbid Tales EP, but not the band's previous album. Into the Pandemonium is the second studio album by Swiss extreme metal band Celtic Frost, released in 1987.
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