Bunkeranlage 4.8 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. We recommend checking the downloaded files with any free antivirus. The actual developer of the free program is Falco Software Company. The software relates to Games.
From the developer:
In 1945, a group of Nazis, from a secret base in Antarctica, fled to the moon with the help of the latest developments in the fields of anti-gravity and jet engines. They soon mastered the extraction of helium-3, an inexhaustible source of energy. Seventy three years later, in 2018, as part of a US presidential election campaign promise, the Americans send astronauts to the moon for the first time since the 1970s.
You may want to check out more software, such as Midnight Strike or Air Grenades Eliminator, which might be similar to Bunkeranlage.