This is the official application for the video game, "Batman: Arkham City".

In the game, you can play as Batman, Catwoman or Ra's al Ghul, and your goal is to save the city from the villains.

You can buy many different gadgets and weapons.

You can also examine the criminal and find out what they have done and where they have hid.

You can do many different things, such as:

Go to different places and find out what is happening there.

Use your skills to find out who the villains are and how to stop them.

Use your knowledge to find out the secret of the city and the villains.