How to Find the Arkham City easter egg in Batman: Arkham Asylum

When Batman: Arkham Asylum came out, nobody would have guess how awesome the game would be. It managed to do what no other Batman game before could do, make gamers actually feel like the Dark Knight.

So it's no surprise that the developers are already working on the next big game Batman: Arkham City. But did they work on it after the game was a huge success or before? Well in this next tutorial from Achievement Hunter, you'll find out the answer to that question. So good luck and enjoy!