Director David K. Ginn made the cast watch both Dead Alive (1992) and The Monster Squad (1987) to get a feel for the kind of movie they'd be making.
According to writer/director David K. Ginn, the biggest inspirations for this movie were the works of directors John Carpenter, Peter Jackson, and Joe Dante, specifically Dante's tendency to start a movie with an upbeat feel and save most or all of the chaos until the last Act.
Was funded through Kickstarter donations, and through private investors.
Nearly all of actor Paul Wallace's lines were adlibbed during rehearsal and written into the script before production. According to writer/director David K. Ginn, the character Brady was originally written to be the "boring character", until Wallace came on board.
Was originally intended to look and feel like a '70s grindhouse movie. Some of these elements remain, such as some of the wardrobe choices and camera angles, but most were abandoned during production.