Artist H.R. Giger, who passed away yesterday at the age of 74, is best known for his landmark (and Oscar-winning) work on 1979's 'Alien.' That's his most famous creation above.

But he was also responsible for some of the weirdest and most imaginative album covers ever made. The Swiss artist brought his surrealist touch to all of his work, combining a sort of stylized sexuality with nightmarish dreamscapes.

These are some of the best album covers of his career, which came before and after his 'Alien' masterpiece.

Emerson, Lake and Palmer, 'Brain Salad Surgery' (1973)

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Magma, 'Attahk' (1978)

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Debbie Harry, 'Koo Koo' (1981)

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Celtic Frost, 'To Mega Therion' (1985)

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Steve Stevens, 'Atomic Playboys' (1989)

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Atrocity, 'Hallucinations' (1990)

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Danzig, 'Danzig III: How the Gods Kill' (1992)

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Carcass, 'Heartwork' (1993)

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Triptykon, 'Eparistera Daimones' (2010)

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Triptykon, 'Melana Chasmata' (2014)

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Bonus Art

In 1985, the Dead Kennedys released their third album, 'Frankenchrist.' Inside they included a poster of Giger's 'Landscape #XX,' which became better known as 'Penis Landscape.' The artwork pissed off the Parent’s Music Resource Center (PMRC) and launched a lengthy trial. Here's that piece:

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