Gamespot has posted a 14-minute developer walkthrough of Batman: Arkham City that shows off a whole bunch of bone-crunching gameplay. It starts with some Catwoman gameplay and associated arse-kickery, and quickly leads on to Batman doing what he does best. The developer boasts that there is more than 25 hours of gameplay to be sucked out of Arkham City if you want to chase all the side missions with a 15-15 hour core storyline. Woah.

“Batman: Arkham City builds upon the intense, atmospheric foundation of Batman: Arkham Asylum, sending players soaring into Arkham City – five times larger than the game world in Batman: Arkham Asylum – and the new maximum security “home” for all of Gotham City’s thugs, gangsters and insane criminal masterminds. Set inside the heavily fortified walls of a sprawling district in the heart of Gotham City, this highly anticipated sequel introduces a brand-new story that draws together a new, all-star cast of classic characters and murderous villains from the Batman universe, as well as a vast range of new and enhanced gameplay features to deliver the ultimate experience as the Dark Knight.”

Check out the video below and some recent screenshots on the game page here.