Is based on the story "The Shadow Over Innsmouth" By H.P. Lovecraft. The movie has been in various stages of production for well over 15 years.
Paul's shirt in the film indicates he is an alumnus of Miskatonic University, an institution that features prominently in H.P. Lovecraft's stories and one of the settings in Reanimator, the first Lovecraft adaptation by director Stuart Gordon, producer Brian Yuzna and writer Dennis Paoli.
Paul Marsh was written to be a Woody Allen-style comic hero.
Ezra Godden actually modeled much of his performance on Harold Lloyd, which was the source of the glasses.
Brian Yuzna was in his car once with his wife, Kathy, and they were stopped by a gunman. Although terrified, Yuzna grabbed the gun and started smacking the guy with it. They ended up fighting, and Kathy started hitting the gunman with her cellphone to get him off Brian. She said "I've got to get a bigger cellphone," hence the use of the line in the film, which the filmmakers felt was representative of heroics of ordinary people.
The Lovecraft quote shown just before the credits is a paraphrasing of the last line of "The Shadow Over Innsmouth", the story that most of the movie is based on: "We shall swim out to that brooding reef in the sea and dive down through black abysses to Cyclopean and many columned Y'ha-nthlei, and in that lair of the Deep Ones we shall dwell amidst wonder and glory for ever."
The chant by the locals at the sacrificial ceremony near the end, "Iä! Iä! Cthulhu fhtagn!" appears in many Lovecraft tales, shouted by followers of the Old Ones.
The name of the cursed town is Inboca. Boca means mouth in Spanish, so translating and adding an "S", you get In-s-mouth, the original name of the town created by Lovecraft for his "Shadow over Innsmouth" story.