Assassin's creed/Naruto crossover.
Plot: When Naruto is eight years old he's attacked by some villagers and almost killed, Enraged by the fact that he was almost killed due to being stuck inside of such a weak child the kyuubi uses his power to make Naruto stronger.
Rules: Every night when Naruto goes to sleep he dreams of his ancestor who was an assassin because of this he slowly begins to gain his ancesters skills leading him to begin his journey through life.
As he grows as an assassin he begins to notice things that he never saw before, things like how the villagers treat him and how they call him a demon fox or the kyuubi child. Because of this stuff he learns that he holds the kyuubi inside of him, deciding that he needed answers he uses his skills to sneak into the hokages tower in order to gain answers. Once inside the hokages office he discovers a file that details his life and who his parents are, depending on which route you decide to go on the file can have whatever else you want in it such as the plans on turning Naruto into a weapon for the village.
If you go this route though Naruto should become enraged and flee the village only to come back later in order to exact his vengeance on those involved in making his life hell.
The rest of the story is up to you but there must be bashing of Sasuke, Sakura, Danzo, The elders, and the civilian council members.
Naruto must keep his abilities a secret from everyone that means no trusting anyone.
You can have a harem for Naruto or he can be by himself but the woman he's paired with most be serious kunoichi.