When Annie searches the Internet for Judas, she comes across the fictional "Judas-The San Pedro Killer." However, the summarized murders attributed to Judas are in fact the victims (including actual names and locations) of the Zodiac Killer.
Annie has a condition known as complete heterochromia iridum (literally "different coloured iris"). Its cause is unknown, but many experts believe it might result from a lack of genetic diversity.
Character names 'Glick' and 'Barlow' are also in Stephen King's book ''Salem's Lot'
A sequel entitled The Pact 2 was released on VOD in September 2014 and was given a limited-theatrical release the following month. The film had Lotz, Steger, and Hudson return to perform their same roles, and Camilla Luddington was brought on to perform in the leading role of June Abbott. McCarthy did not return to direct the film, which was instead written and directed by Dallas Hallam and Patrick Horvath.
The motorcycle Annie rides is a 1971 Honda CB175