The nazi scientists were working on an aircraft named "the bell". During that time there had been recent ufo sighting before the project was started. i believe the scientist were copying a ufo structure that have been seen. i also believe that the nazi had infiltrated a certain element from a meteor that landed in germany that no one knew about because their military didnt want anyone to know about it. i know it sounds similar to call of dutys infamous nazi zombie mode, but i do belive that the nazi were acually using the bell projects form to create a teleportation device. i think the game shares more information than just locations about the tunguska meteor but it makes some sense. Why would the nazi try to create a flying stucture? Why would they use the shape of a bell? Why would they keep a meteor secret? I will continue my research. And hopefully get to the bottom of these mysteries.