I grabbed a copy of this and started playing it. Like some others, I stopped when things got too difficult and there was no way to save, except by going all the way back home or one other location.
Bugs Encountered, some may have already been mentioned. (contains spoilers)
One objective that others have noted is impossible to complete without killing everybody in the area. Another one is only possible to complete covertly, there are just far too many enemy solders for one person to take on.