How can I fix my CD for a video game that keeps freezing when I try playing it?

I try to play my game, but after a couple minutes or so it freezes all the time in the beginning and my console then says that the CD can't be read. I look on the back and there's no scratches or anything. In the light, instead of seeing lines extending out from the middle (like a regular CD shows) I see wavy rings around the middle, extending. It was like water rings, when something drops into water and creates rings. Except they aren't perfect circles, they're wavy.