Where could I download the games Batman: Arkham Asylum & Arkham City for free?

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I'd love to have the game "Batman: Arkham Asylum" %26amp; "Arkham City". I have a MacBook Pro. What are some good places I can get the game for free, if any? Another question is, what type of game controller is available for it? I'd rather play with a controller than my keyboardWhere could I download the games Batman: Arkham Asylum %26amp; Arkham City for free?
Try myplaycity.com.