Sonic Generations is packed with unlockable content that celebrates the franchise's history. By completing stages, earning S Ranks, collecting Red Star Rings, and finishing Challenge Acts, you'll unlock a vast array of music tracks from past Sonic games, concept art, character profiles, and even cutscenes. These collectibles can be viewed in the Collection Room within the Hub World. Dedicate time to achieving high ranks and completing all optional content to fully flesh out your collection. It's a fantastic way to revisit the rich history of Sonic the Hedgehog.
