The video game featured in the movie, Demonik (2006), was to be an actual video game that was to be released for the Xbox 360. The project was cancelled when the production company Majesco Entertainment ran into financial troubles.
Barely grossing $6 million in its original theatrical release, this film has made over $50 million in DVD sales.
When Alex (Allen Covert) tells Jeff (Nick Swardson) to "shut up" when he spends the night at his house, it was to keep him from ad-libbing even further about his sweet car bed.
In the DVD commentary, Nick Swardson said it was really weird kissing Shirley Jones while filming their lovemaking scenes because Jones' husband was present on the set making it completely awkward.
According to Nick Swardson, Adam Sandler once introduced him to the CEO of Blockbuster Video, who told Swardson, "Your movie Grandma's Boy was one of the most stolen movies of all time because nobody fucking returned the movie ever."