The Nazi zombies in this film are a combination of typical zombies in popular culture and ancient Norse mythical beings known as draug. A draug is a undead being who would inhabit graves, often the graves of important men, as they often had treasures in them. A draug would protect these treasures as if they were their own.
Originally it was going to be called "Rød Snø" (or Red Snow in English), as an homage to the Swedish/Norwegian mini-series with the same name.
This film's main trailer shows black-and-white World War II archive footage, including battleships, parachuting and a command room featuring Adolf Hitler, but this material is not seen in the actual movie.
According to the date on one of the character's tombstones shown in the sequel, this film takes place in April 2013.
The English translation of the town Øksfjord is Axefjord.