"If I haven't made myself clear, this worrisome chain of events describes the game of the nineteenth century"

In this quote, John Thorn is expressing his issue about a series of events that he deems unpleasant. He recommends that if he hasn't made himself clear about this, it is due to the fact that there is a lack of understanding or interaction about what is happening. Thorn then describes this succession of occasions as explaining the video game of the 19th century, indicating that the concerns he is describing are not isolated incidents however are part of a bigger pattern. Overall, the quote suggests that Thorn is stressed over some bigger trend or issue with the game of the nineteenth century that needs to be dealt with.