The director's cut of The 25th Reich features the spoof ending: "To be Continued in The 25th Reich and The War with God" - a homage to 1930's and 40's serial cliffhanger finales. For the U.K. release, the distributors deleted this ending.
The 25th Reich was photographed in the remote mountain wilderness of the Victorian Grampian Ranges, where temperatures fluctuated between 50 degree days and 2 degree nights. The crew hauled camera equipment up and down mountains in very difficult conditions. Aside from the many rolled ankles and torn ligaments, scorpions were to be found under every second rock, along with deadly Tiger Snakes, Red Belly Black Snakes and giant Orb Spiders. The water tanks brought in for the crew were eventually found to be carrying parasites, making the shooting of The 25th Reich a difficult and daunting experience.
Actor Jim Knobeloch (Captain O'Brian) tore his hamstring six weeks into the shoot. Unable to walk, the filmmakers had to shoot around him for the last week. Several close-up shots from the film have Jim on a 100ft dolly track, pretending to race through dense wilderness.
Given the low budget nature of the movie, the producers recruited small teams of visual effects artists across the world to produce the VFX. A small render farm was purchased and placed in the kitchen of actors Dan Balcaban and Jak Wyld's apartment...sitting between the microwave and the fridge, it was rendering 24 hours a day for six months and helped warm the house in winter.
Coming from a film background, and uncertain about shooting with the emerging RED digital camera system, director Stephen Amis actually shot a short 15 minute Western as a precursor to The 25th Reich in order to thoroughly test the technology.