Harold Ramis's last role of Dr. Egon Spengler.
Dr. Peter Venkman:
Coffee time everyone, service has been declined beyond this point.
The so-called "Grey lady" has been bright purple every time she has been seen. Why would she be dubbed "the Grey lady"? Because "grey lady" is a common paranormalist term for an elderly female ghost, regardless of the coloration of the apparition.
Despite being made in 2009, the intro movie for this game carries the 1980s Columbia Pictures logo on it, just like the original Ghostbusters movie. However, the Columbia logo seen before the main menu loads is the modern one.