No attempts are made to explain how the Nazis got to the Moon, nor how they survive. Much is made of how technologically inept the Nazis' mad scientist is, yet moments later the Nazis are flying to Earth on a fleet of heavily armed spaceships.
The action is made up of a series of humorous set-pieces, with a central romance in which the perfect Aryan female (Julie Dietze) falls in love with a black astronaut. It's the type of film Hollywood studios would not touch with a bargepole - though it has been hailed as this year's answer to Snakes on a Plane.
As such, the film-makers were forced to go underground. The internet has been buzzing about Iron Sky for months and its trailer released a few days before the premiere in Berlin received a million hits in less than 24 hours.
The film-makers have cleverly made up for the small marketing campaign with a perfectly executed viral attack on social media sites and those who helped fund the film have also helped promote it.
"The internet played a big role in the film-making process. The idea was to make the production process itself a part of the story and it's a big marketing aspect as well," says Vuorensola. "It was funny to be so popular. It's hard to understand how we got so big."
Using the internet for movie financing is an increasingly common phenomenon. There are a growing number of websites such as Kickstarter that aim to help film-makers find money for their films. Kickstarter works by setting a time limit and a funding goal: if the target is not reached, the money is returned to potential investors.
"You have to find a way to pitch the film in a way that is really easy to understand and easy to grasp," says Vuorensola. "The attention span on the internet is so short you have to grab them with something. For this film, it felt so organic to use the internet community to fund and support it." The only downside is that the sheer number of investors makes the end credits incredibly long.
What: Iron Sky, sci-fi comedy about Nazis, who have been hiding out on the Moon since 1945, returning to Earth
When: Opens at cinemas next Thursday
On the web: www.ironsky.net
- TimeOut / Independent