Nothing to do with Downfall, natch. In fact it's been a while since I've seen anything like this. Downfall is a old school point-and-click horror adventure, and has apparently just been released on D2D by tricky-to-pronounce developer, Remigiusz Michalski. The game begins with your character arriving in a rainy town, accompanied by a girlfriend who seems to be having a psychotic breakdown. Needless to say, things get worse from there. There are some rather disturbing scenes from the opening moments, although the effect is offset slightly by the crude and clunky animations of the characters once you get into the game proper. Still, you don't need to rely on my judgment in this instance, as there's a demo to be found here. The trailer (below) suggests that it's not going to have a happy or (stain-free) ending.
CDPR say they're in talks with mod authors
We've been talking, and we think that you should wear clothes
Total coincidence, but we sell some clothes