legal – Is attribution sufficient for a CC BY-SA 3.0-licenced font in a video game?

I’m creating a video game I intend to sell on computers, and I want to use a font that is under the license “Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)”.

Do I have to sell my game under the same license, or is it enough just to credit the creator?

I have done research but I’m still unsure.