In my opinion, this game HAS to be challenging in order to keep my interest long-term. I wonder, do you think the game will be challenging? I'm assuming there will not be different levels of difficulty (easy, normal, heroic, legendary) so where will the challenge come from? Are you worried that Bungie is trying to make the game fun for everyone, inadvertently removing the challenge? It was stated in a gameplay demo that players of all skill levels can contribute and skilled players will stand out. How do you think this will happen?