In Pac-Man, each ghost has a distinct movement algorithm that is entirely deterministic. In Ms. Pac-Man, initially an aftermarket hack of Pac-Man, each ghost h

In Pac-Man, each ghost has a distinct movement algorithm that is entirely deterministic. In Ms. Pac-Man, initially an aftermarket hack of Pac-Man, each ghost has its own distinct movement algorithm but there is some randomness. Interview w/ the creators of Ms. Pac-Man: https://www.fastcompany.com/3067296/the-mit-dropouts-who-created-ms-pac-man-a-35th-anniversary-oral-history https://www.fastcompany.com/3067296/the-mit-dropouts-who-cre... I'm not sure how they achieved the (pseudo-)randomness, but I don't think the Ms Pac-Man conversion added new hardware other than new ROMs? Not sure about that assertion.