Going back to the initiation.jpg image, after playing with the contrast a bit, I see what vaguely resembles a gun in the upper left corner.
Update/Edit: I have a feeling Mura is Gun Massacre.
Update 2: I think I see a distortion in the shape of a gun in the "communication" video. 0:24 and a few seconds afterwards is where it's most prominent.
Note: The gun shape looks like a revolver of some sort if I'm correct about it being a gun.
