The copy leaked on torrent sites is an EXACT DUPLICATE, one-to-one, copy of the DVD that is given in shops. However, due to the files being encrypted and therefore useless without decryption, the ISO is useless until the files are decrypted via Steam, so really, all this is useful for until a crack comes out for the DVD is a differing, no-way-to-officially-pirate-and-so-therefore-legal way to ...