Extended survival horror is a sub-genre of Survival horror.
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This sub-genre is in partial contrast to ‣.
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Extended survival horror has all of the requirements of Survival horror plus the following additions:
Must involve a significantly long enough time period to require sustenance and not just avoiding dangers
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That is what ‣ as a genre normally means.
Robinson Crusoe is a classic survival story.
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This requirement rules out many horror movies where characters are required to survive some monster over the course of a single night.