Wow this was a truly introspective journey, it puts on the table what others have not about the morality of killing your fellow man who has become ill. I seriously need to take a moment in shame for what I have done to mankind with a gun.
It's fun, there's a lot to unlock, but after you play a couple maps it just becomes a grind. Not that it's slow or anything, I sat down and started playing and 4 hours went by before I knew it!