I love the concept of the game. But the stealth in the game is so difficult, even on casual difficulty, that it destroyed the game for me. I'm walking down a street, with no weapon, alongside dozens of NPC's. I walk past a couple Germans, and they almost immediately start shooting. It's a shame. I think the game could be fun, but the detection is broken, IMO. Sure, if I'm sneaking or acting suspicious, or even running, I could see the Germans getting suspicious, but if I'm walking along just like all of the other citizens, it breaks the immersion that the Germans just suddenly start shooting at me while other civilians walk by the same spot unmolested.
I tried this on Windows 10 Pro. Even tried on different compatibility modes as far back as XP. It doesn't run. I am running two monitors. I wonder if that might be the cause. The first monitor goes black, and the second monitor flashes a few times before it throws an error about initializing the graphics .