I you have Arkham city buy this

Basically this app will tell you how to find all riddler trophies and riddles. I know you can find them all on the Internet one way or another but for the small price there asking it beats the hell out of having to search for hours for all of them. My only complaint is that they should add other collet blues such as Tyger cameras, Harley heads and penguins. Once again this app is essential if you plan on completing the enigma conundrum side mission.

Simon Gibson about Batman Arkham City Official Map App, v1