Comment by Kkoala

A similar thing happened to me, not with a video game, but with chess!

Started seeing a chessboard overlayed everywhere, and thinking what the next move for me and other "game objects" would be.

This was after just getting into chess and playing it many times a day, almost every day.

It was a very weird feeling. Luckily, it passed after a while. I stopped playing chess after a while too, and kinda been avoiding it since.