How to Get Bonus Stage Achievement in Sifu This guide will be showing you how to unlock the Sifu achievement called Bonus Stage. Bonus Stage Earn this achievement by selecting the “Car Club” arena. Simply beat up the blue car right next to where you spawn, until the achievement pops. This guide about Sifu was written by salmonwine. You can visit the original publication from this link. If you have any concerns about this guide, please don't hesitate to reach us here.