Played for about 4 hours on the new version in one sitting. Zombies, they cannot see better, but they hear better, they seem to hear axe strokes now and come to them. The winchester seems to really really attract them now. I found antibiotics in the first building i crawled into. The boil water seems to work find, but water from a well or resivour should already be clean. You should be able to drink with a water source and a can.... I found not a single hand gun in 4 hours. I never saw one crashed heli going from Electro, to the mid west, then accross through stary all the way back to the east coast near that big garage. Zombie behavior is fine, but the side effect of lots more swings through the sides of buildings and zeds walking right through walls is kind of lame. I did get killed half way through my journey by one swat from a long armed Z, but made it back from the wilderness to my body and carried on. I keep seeing dead zombies lying around. I like the upgrade, I wish I could sling my rifle and still carry the axe.