Well, it's hard to give an exact number of hours. But typically, to complete the core story of Arkham Asylum without getting too bogged down in extras, you could expect it to take around 10 to 15 hours.
In this fanfiction, Naruto could be a patient in Arkham Asylum. He has lost his memory and believes he is in some strange version of Konoha. The doctors at the asylum are trying to understand his 'delusions' about ninjas and chakra. Meanwhile, some of the more evil inmates sense his power and try to manipulate him for their own gain.
Overall, the Arkham Asylum game is fairly faithful to the comic. It features familiar characters and settings, but there are some gameplay-driven tweaks and additions to enhance the interactive experience.
A 'naruto in arkham asylum fanfiction' would likely involve Naruto being transported to the Arkham Asylum universe. He would be confused at first, but then quickly adapt. His chakra abilities would seem like magic to the inmates and staff. He might try to find a way to get back home while also getting involved in the internal power struggles within the asylum.
One of the main themes is the nature of insanity. It explores how the inmates of Arkham Asylum, with their various forms of madness, interact with each other and the world around them. Another theme is the thin line between good and evil. Batman, who represents justice, has to deal with the chaos and moral ambiguity within the asylum. Also, the power dynamics within the asylum, between the inmates and the staff, are explored, showing how control and lack of it can affect the overall environment.
One idea could be that Naruto is somehow transported to Arkham Asylum. He might initially be confused by the strange new world, but his ninja skills could come in handy. For example, he could use his speed and agility to avoid the traps and villains in the asylum. Maybe he teams up with Batman, who is intrigued by Naruto's unique abilities.
Well, 'Arkham Asylum: Living Hell' is quite interesting. It shows the chaos and horror within the asylum from a different perspective, perhaps that of a new inmate or a staff member. Also, the graphic novels that focus on the relationship between Batman and the Arkham inmates, like how he tries to maintain order while dealing with their madness, are essential reads.