While the temptation to simply Google "Real Steel PS3 ISO download" is strong, you must be aware of the risks:
If you are looking for a official way to purchase the game, there is a major hurdle: from the PlayStation Store on February 9, 2017. real steel ps3 iso
That said, due to the age of the title and the fact it is no longer sold commercially, many preservationists argue that downloading the ISO is a form of video game preservation. We recommend ripping your own copy if possible. While the temptation to simply Google "Real Steel