Red Star Rings are special collectibles, with 5 hidden in each act. Collecting all 5 Red Star Rings in a single act will reward you with a Chaos Emerald for that world. There are 7 Chaos Emeralds in total, and collecting all of them is necessary to unlock the true ending of the game and the ability to play as Super Sonic. These rings are often placed in challenging locations, requiring clever use of Color Powers, precise platforming, or exploration of hidden paths. The game saves your progress on collected Red Star Rings even if you fail an act, but you must collect all 5 in one run to earn the Chaos Emerald.
