Concurrent Demise features five radios, four of which are required to be listened to in order to complete the Demonic Embrace Major Easter Egg. While one is unrelated to the other four, it provides valuable information on the creation of the Scavenger V2.
Richtofen Radio (1)[]
This radio appears to explain that Richtofen modified the Scavenger to make it fit Wonder Weapon Status.
Edward Richtofen: Zis Scavenger rifle does not qualify to be equal to the likes of ze Thundergun and Vundervaffe DG-2, however I believe the modifications I have made to zis veapon makes it so. (A shot can be heard, followed by a large rippeling noise. Zombie screams are heard, followed by Takeo appearing to step towards Richtofen)
Takeo Masaki: What is that Doctor?
Richtofen: Oh, nothing.
Tank Dempsey: Stop playing with your toys and lets kill some freakbags!
Radio 2[]
The Radio seems to reveal that more members of the Nazi Zombies Plus wiki had arrived at the map
(A Teleporter is heard going off, followed by three seperate footsteps being heard)
CornOnTheCod: Where the hell are we?
Captain MacMillan: I don't know, but I don't like it.
Gruntijackal: This looks familiar...
(PhD Flopper's theme music is heard going off as more footsteps are heard)
Cappie: Help me get this door open!
(Three seperate bangs are heard going against the door as it submits and slams open)
CotC: Wow what the hell is that?
(A Zombie's growl is heard, followed by frantic running, and heavy breathing)
GJ: Its just what we need.
Demonic Announcer: (faintly) Fire Sale!
GJ: That's right, fire sale, that'll distract the dummkopfs.
(The Radio cuts off into static)