Conversation so far:
Were these albums a success?
Few albums struck a chord within the ears and minds of the late-'80s underground metal scene like Morbid Angel's Altars of Madness did.
Did any of them win awards?
CANNOTANSWER.
Were there any influences in marking of these?
CANNOTANSWER.
Are there any other interesting aspects about this article?
Their first studio album, Altars of Madness, was released in 1989, and is regarded by many as one of the most important death metal albums of all time.

Question: Why is it regarded as one of the most important?
Self-contained rewrite: Why is Altars of Madness regarded as one of the most important death metal albums of all time?