Iron Sky: Invasion is an official video game expansion of the 2012 Finnish science fiction comedy Iron Sky. Iron Sky: Invasion is a space fighter simulator, enhanced with strategic and RPG elements, set in the universe of Iron Sky and expanding upon its foundations. The core of the gameplay is based on ship-to-ship dogfights, combined with assaults on giant spaceships (such as the space Zeppelins, portrayed in the film), as well as tactical thinking and resource management. (wikipedia.org)