Aesthetically, each instalment has come with a hefty dose of body horror.

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The phase of life Shelley was in now, anyway, the heat of her body came and went in blasts, and she had a horror of being caught out in tight clothes.

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Focusing on the horror, "that's harder on our body and our mind, " said Dr. Catherine Mogil, co-director of the family trauma service at the University of California, Los Angeles.

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Whatever it is, upcoming first-person-horror title Among the Sleep places you inside the mind and body of a two-year-old who awakens to a nightmarish world of imagination gone horribly wrong.

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