When Ezra yells, "You think you're better than me!?" this is a tongue-in-cheek reference to the alternative rock band Better Than Ezra.
David D. Jones is an American who wrote the original screenplay and director Alastair Orr added some new ideas to the script, including the addition of pop culture references to make it an intentional "horror-comedy".
The cast of nine friends had never worked together before. When they were not shooting, they would spend their time bonding over drinks and playing Laser Tag. Reine Swart credits co-star Cameron Scott with the idea and to this day, the cast remains friends.
Steven John Ward and Russell Crous actually would make contact with each other during their fight scene because they wanted to add a sense of realism to their characters' situation.
Inspired by retro video games from the 90s.