It was an Xbox360 game.
I burned the iso file on a Verbatim DVD+R DL dics usinf SlySoft's Clone CD, like it was reccommended before. I used 2-2.4x writing speed. It said that burning was successful. The disc works in my computer, but when I put it in my Xbox360 console it starts reading, but then stops and gives me an Unrecognized Disc Error, but in the dashboard it says "Play Game". Why is that?