Devil Survivor - Naoya Route

SPOILERS: This article contains spoilers Devil Survivor/Overclocked
The ending with Naoya is were, the (Devil Survivor) Protagonist decides to side with the Demons, instead of the Angels. By doing this you go against what the Shomonkai wanted, but instead go with what Naoya wanted, revenge against God. He wanted this because he is the reincarnation of Cain, the first murderer in history. The one who murdered Abel, the first murdered.

This is a rough outline and may not be correct. It does give some enlightenment toward the Naoya route; may be subject to change, thank you for your patiance.