by rule

They might hold the line for a while and try to keep on playing by their special rules.

Of course he could always play by his own rules.

We need to force them to play by our rules.

Why do we have to go by everyone else's rules?

They want to see if we'll both play by their rules.

The second half of the week the new wife will get to make the family play by her rules.

She wants to live by her own rules no matter what people say.

They're playing by different rules now than when I started out.

We have to live by rules in other areas of our lives.

He was in the hands of people who played the game by very different rules.