Not sure if this is been posted but just to let you know batman AA CD key is available for a very low price of £11.75
http://www.g2play.net/store/Batman-Arkham-Asylum-CD-Key.html
Not sure how you actually download the game but the cd keys seem very cheap!
http://www.g2play.net/store/Batman-Arkham-Asylum-CD-Key.html
Not sure how you actually download the game but the cd keys seem very cheap!