How do I S Rank "Scarred Planet"?

[Zanmato145]

I can't seem to S rank it. I can't get past these bunches of rubble :/ most I can get is an A

[kejen]

You need to get the googles to break the rubble and kill everything behind it.

To get the goggles do the story mode on the 5th floor. They give it to you on the first mission so you can just quit out.