'Arkham City' campaign 'at least 8 hours'

Details of Batman: Arkham City's campaign have emerged.

Rocksteady's marketing game manager Dax Ginn has told CVG that the story will be eight hours in length without side quests or exploration.

"It's very difficult to put a number on it," he said. "I can tell you that our QA guys, who are ninjas and obviously know everything in the game, can do just the core story missions, nothing else, in about eight hours, just straight-lining.

"And they know exactly where to go, what to do - the most efficient way of doing it. So, [for] someone who has no idea what to do and wants to complete everything it's going to be significantly more than that."

Last week it was announced that Batman: Arkham City will be available in October for North America and Europe.

It will be released on Xbox 360, PlayStation 3 and PC.