Yeah I have also put this in the game's description - I used an AI to write parts of it, especially the early on prose which has a higher ratio of this, because I was trying to make an AI dungeon master. It is generally AI-assisted writing I would say, with a higher ratio at the beginning, and lower ratio at the end. It is a custom bot I made based on gpt4, and using this lorebook:
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I enjoyed using it to throw scenarios and curveballs at myself, and then added my own writing to "react" to it, as a back and forth. I think overall it makes the narrative fairly hard to predict where it will go.