When Company of Heroes 2 came out, there was controversy for its lack of historical accuracy of the Russian army during WW2 with portrayals of actions such as shooting their own soldiers if they retreated (there is a mission where there is Order 227 in effect), burning houses using scorched earth tactics with civilians inside, telling their soldiers to continue to push through in Stalingrad during Operation Barbossa even if it meant going straight through the line of fire of MG42 nests or pushing through without a weapon, abondoning their own soldiers to avoid the Germans from advancing, and so on.
This caused a lot of controversy among Russian players as they felt that it portayed the Russians in a stereotypical manner and not accurate to the historical context of WW2 from the Russians' side.
So how accurate is this portrayal? Were there other war crimes that were potentially committed by the Red Army?
Although only covering a part of your question, this might be of interest for you.