When you start and "Dave" starts talking to you and the choach(I can't remeber his name) says "Hey, you boy who are you talking to?" which makes me belive "Dave" is another personality and that "Dave" is his want for revenge or mabye his want for friends and even mabye his want to simply kill. That is my opinion as a never will be certified Psychiatrist.
Have people with AI that cut down trees and build mine for metal and make a small city. make boats and fish And hunt for deer {need them too} just more stuff.
I am sorry, we updated the game that`s why you lost your saved game :(