Just judging by the title of the article, the process was a long one. If you start at the entry point of the game and trace every memory access, and you run th

Just judging by the title of the article, the process was a long one. If you start at the entry point of the game and trace every memory access, and you run the game in a profiling and debugging emulator, you can figure out what every variable does. It’s a long and painstaking process. Definitely one you probably don’t embark on unless you really care about the result (or you’re well paid).