What are Achievements?

In Sonic Runners Adventure Achievements are special rewards that give you a significant number of Rings. To claim them you have to complete the achievements under a particular category, this will usually involve defeating a certain amount of Badniks or beating the boss of the Chapter.. You can view the Achievements and the progress you are making in them by going to the Achievement section at the main menu. Once an Achievement has been completed once you can complete it again at a higher level and get greater rewards for compleing the whole set.