Here's a quote from the story:
"The intensity of fighting can be seen from what one Wehrmacht lieutenant wrote: "We have fought fifteen days for a single house. The front is a corridor between burnt-out rooms; it is the thin ceiling between two floors... From story to story, faces black with sweat, we bombard each other with grenades in the middle of explosions, clouds of dust and smoke, heaps of mortar, floods of blood, fragments of furniture and human beings... The street is no longer measured by metres but by corpses... Stalingrad is no longer a town. By day it is an enormous cloud of burning, blinding smoke; it is a vast furnace lit by the reflection of the flames. And when night arrives, one of those scorching howling bleeding nights, the dogs plunge into the Volga and swim desperately to gain the other bank. The nights of Stalingrad are a terror for them. Animals flee this hell; the hardest stones cannot bear it for long; only men endure."
http://history.vif2.ru/library/battles/battle1.html
Don't you 'feel' that in the demo to some degree?