Just changed the above settings and tried again. Stumbled onto another level, lol. I was trying to clear the scene of imps, going around the perimeter to clear them (going in the middle and working outwards was not working) and hit an unknown loading screen. Unfortunately it crashed
Noticed the suit warning did give up after a bit, but I'd defo make it loop a lot less often
It took 12 seconds to load to the menu and 1 min 6 secs to load the first level btw.
That's my best attempt, think I got all the hostiles, didn't shoot any that didn't attack first, so could have added a few to the total. Can't get to the second level though, not sure if you are supposed to leave the non aggressive imps alone or not
Oh one other issue, the roads are very black and so are the loot drops, so can be very tough to see enemy ammo/guns when you kill them on a road.
SPECS: Ryzen 1700 CPU. Nvidia 970GTX. 16 Gig Memory. Win 10.