In the firehouse, upstairs near the computer, is a children's drawing of a ghostbuster that says, "To Uncle Egon, From Ed". Ed Spengler, from the fan films Freddy Vs. Ghostbusters and Return Of The Ghostbusters, is the nephew of Egon. When the game is set to take place (1991), Ed would have been just a child. (PC/PS3/X360 version only)