The name "Lorem Ipsum" comes from dummy placeholder text used in typesetting. The majority of the standard Lorem Ipsum text is actually spoke in the game at one point, read by Nate from an ancient document.
The character Tin Lizzy is named after the band Thin Lizzy.
Wilbur finds graves with the names Lugosi, Karloff, Chaney, and Lee on them. All are the surnames of famous horror actors: Bela Lugosi, Boris Karloff, Lon Chaney, and Christopher Lee. When Wilbur asks the Mayor about the Chaney family, he's told that Chaney was a traveling actor known as the "Man of a Thousand Faces", and that his son took over the acting business. This is a direct reference to Lon Chaney, who did have that nickname, and whose son was also an actor. When asked about Karloff, the Mayor says that he was caught by a mummy. Boris Karloff played the titular character in The Mummy (1932).