Sir its a video game (we like to kill things in video games because its something most of us [hopefully] will never do), and its kind of ironic hearing this from a guy with Kratos for an avatar.
Well, first of all, this is an old avatar. I had no idea I was even still using it until I made this post.
Secondly, God of War isn't a role-playing game. You play as this dude Kratos who is really angry and wants revenge against the gods. Not too many ways to play that game and there shouldn't be.
And the reason I want to play through Fallout New Vegas without killing anything is because I like challenge.
The point of the post though is that nobody seems to be talking about how much freedom there is in this game and that includes the option to not kill anybody. And I would say also that they should mention that you can kill everything in the game (except children) as well. Not too many games let you do that.
Of course, if there was no ESRB we could probably be allowed to kill the children as well.