Definetly. The full title is literally "Darkest Hour - A Hearts of Iron Game", most call it simply DH. It was made mostly by modders who didn't like the direction of the game with
HoI4 HoI3. Published in 2011. As one can imagine with such authors it was made in a very mod friendly form and is by many seen as the climax of, when you want to call it that way in comparison to HoI4, old-style HoI games.
Not surprisingly the still most active part of the
DH-Forum is the
modding section.
And yes, the
AAR Forlorn Hope by Rolexovsky is worthwhile. The "Endsieg" scenario is by far the most difficult DH has to offer, even experienced players shy away from it. No wonder, it features the "Third Reich" in its dire and hopeless situation of December 1944. We can not only watch an expert player but the AAR is also well written with lots of images for illustration.