Ghostbusters (3) occurs during 1991, two years after the events in Ghostbusters II. Players portray a new recruit hired to test Egon Spengler and Ray Stantz's new equipment, during a recent rise of paranormal activity. This paranormal activity begins to occur as the city is about to unveil a Gozer exhibit. The team is thus called to investigate. Along the way, the Ghostbusters encounter several entities from the films, such as the library ghost, Vigo, Slimer, Gozer, and the Stay Puft Marshmallow Man, as well as many mini bosses that will be encountered throughout each level.