Since xkcd has so many different strips, the 'xkcd horror story' could cover a wide array of themes. It might be related to the horror of human nature, such as how people can be cruel or make bad decisions that lead to really bad outcomes. It could also be about the horror of the unknown, like exploring a strange and dangerous place in a very xkcd - style, with the characters having to deal with things that are both absurd and terrifying at the same time. Maybe it's about a time - travel gone wrong scenario where the main character gets stuck in a loop of increasingly nightmarish events.
I'm not sure specifically which 'xkcd horror story' you mean as there could be various interpretations or specific strips related to it. Generally, xkcd often has unique and thought - provoking stories, some of which might be a bit 'horror - like' in the sense of presenting disturbing concepts or situations in its own quirky way.
Well, xkcd is known for its diverse range of topics. A horror story in xkcd might deal with things like the implications of technology gone wrong. For example, it could be about how an AI system starts to have unexpected and menacing behaviors that threaten humanity in a rather surreal or dark - humor kind of way. Or it could be about some strange scientific experiment that has unforeseen and terrifying consequences within the xkcd universe.