Disc & Cover
Open-zone adventure: Explore the five massive Starfall Islands, which are described as a departure from previous Sonic games.
Combat: A new battle system is introduced, combining traditional moves with new abilities like Cyloop, and allowing for strategic combat against various enemies and titans.
Skill tree: Players can upgrade Sonic's abilities through a skill tree.
Puzzles and exploration: Solve over-world puzzles, collect items, go fishing, and encounter other activities.
Story: Sonic becomes stranded on the islands while searching for the Chaos Emeralds and must uncover the mysteries of an ancient civilization to save his friends from a colossal, mechanized threat.