More food for thought.
Something I just stumbled across while looking for something else, a radio espionage mystery from the two Germanys at the end of the Cold War
East Germany detected very short radio transmissions and mounted a months long operation to locate the source under the title Operation Hamster.
While not directly connected to Berlin, it's an interesting bit of information that might be useful for gaming e.g. some of the radio transmitters may still be operable and could be recycled for a similar purpose elsewhere, the PC's have to locate & retrieve the transmitters.
However... it could easiiy tie into the first stages of the war, helping West Germany in some way prepare for the reunification plan.
Explaining more (either about Operation Hamster or the potential for gaming) would be a spoiler for those who enjoy exploring the information so I'll leave further discussion until people feel like discussing it.
http://scienceblogs.de/klausis-krypt...-the-cold-war/
Now for some Berlin content.
A further article I found while trying to find more about Hamster, deals with the USSF unit in Berlin. No specific detail but interesting info never-the-less (and some photos, check out that Cold War fashion!)
https://www.fayobserver.com/news/201...old-war-berlin
And there's this article from the US Army's Armor magazine about East German plans for the capture of West Berlin.
http://ciar.org/ttk/mbt/armor/armor-.../6berlin94.pdf
This article is interesting because it raises the possibility for game use that perhaps the East German Border Guard was dissatisfied with life in East Germany and was complicit in helping West Germany. Needs more work to flesh it our but it's an intriguing option.
https://theaviationist.com/2014/11/1...e-of-the-wall/
And this one, just because it was as much fun to read as it was revealing.
https://www.atlasobscura.com/article...earch-of-clues