Originally the interior of the house was going to be built as a set in an empty office space. After losing their first choice for production designer, the filmmakers were able to acquire a piece of property from a local contracting company. The house was set for demolition at the end of December of 2019 and had been vacant for months. Gabriel Carrer and Reese Eveneshen, now acting as production designers, had just under two weeks to completely decorate the house and get it camera ready for cast and crew. This included gutting one of the spare bedrooms and turning it into a Bathroom for one of the films biggest fight sequences. Through-out shooting, the cast and crew had to share the tight spaces and limited room of the house. There was only one working bathroom. The upstairs had one small room available for hair, make-up, wardrobe and cast. The filmmakers housed their production design materials, as well as the bulk of the camera gear and computers in the adjacent room. The rest of the camera equipment was kept in the house's unfinished basement. After shooting one of the violent scenes in the kitchen above, fake blood leaked through the vents and coated much of the equipment below. Located in the driveway outside was a Camping Trailer that had been rented to act as a small office, and the craft service area.
The films many fight sequences were done 100% practically on set with the stunt performers, special effects technicians and make-up effects personnel. Visual effects were only used for a handful of muzzle flash shots.
The four main cast members performed all their own stunt work in the fight sequences through-out the film.
The Filmmakers enlisted the help of local bike clubs to portray the bikers in the film. Specifically seen in the sequence where the main bikers are introduced. There were three Bikers used for the driving shots that were then subbed out for the Stunt Performers for sequences off the bikes.
Scenes that were included in the script but not shot due to budget and schedule included: More of Romina's backstory; originally the film opened with her recovering from a traumatic incident that happened in her basement. She has trouble still living in her home that said incident occurred in and is reminded of it on a daily basis. Romina trying to carry about with her day-to-day life, but ultimately being unable to due to PTSD. Many references through-out about her fear of going into the basement, including where Chris wants to tie Alan up down there. Several smaller sequences through-out where Romina attempts to get the police involved. In one scene an Officer comes to the door and his eventually sent away by Chris who plays the whole incident off as an accident. At one point later in the film, it was shown that Gerald had a direct line to someone in the police department and was keeping them from coming to the house. Romina tries several times during the last half of the movie to call 911 only for the Police not to show up.
The original ending had Chris, after mortally wounding Gerald, coming back into the Kitchen and becoming enraged again at Alan for still being alive. Chris and Alan fight in the kitchen which leads to them falling downstairs into the basement. Romina is forced to finally confront her fears and descend down there with them. She finds them both dying but still going for each other, each unable to make peace with the other. Romina steps between them and stops their endless pursuit. Both Chris and Alan die staring at each other, angered that Romina has kept them apart. She finds her way back upstairs after the ordeal, sits down in the Chair that Alan was tied up in, and waits as the police finally enter the premise.
Earlier versions of the screenplay had the film taking place during the summer, in a heatwave, with a massive power outage. Originally it was a Collective of Professional Assassins and Bounty Hunters that attack the house with multiple guns. The film then played out as a massive shoot-out between Chris and the assailants. It was also much clearer in these drafts that Alan was in fact guilty of committing the act that Chris is framing him for, and Romina being the one who eventually kills him. One draft also included a mid-way twist where Chris isn't getting the answers he wants and kills Alan in the kitchen before the raid on the house.
The original ending had Chris, after mortally wounding Gerald, coming back into the Kitchen and becoming enraged again at Alan for still being alive. Chris and Alan fight in the kitchen which leads to them falling downstairs into the basement. Romina is forced to finally confront her fears and descend down there with them. She finds them both dying but still going for each other, each unable to make peace with the other. Romina steps between them and stops their endless pursuit. Both Chris and Alan die staring at each other, angered that Romina has kept them apart. She finds her way back upstairs after the ordeal, sits down in the Chair that Alan was tied up in, and waits as the police finally enter the premise.
Earlier versions of the screenplay had the film taking place during the summer, in a heatwave, with a massive power outage. Originally it was a Collective of Professional Assassins and Bounty Hunters that attack the house with multiple guns. The film then played out as a massive shoot-out between Chris and the assailants. It was also much clearer in these drafts that Alan was in fact guilty of committing the act that Chris is framing him for, and Romina being the one who eventually kills him. One draft also included a mid-way twist where Chris isn't getting the answers he wants and kills Alan in the kitchen before the raid on the house.