: The base game's story, written by Ian Flynn, is widely noted for its more mature tone compared to previous titles, focusing on the mysterious Starfall Islands and the relationship between Sonic, his friends, and the AI character Sage.

The for the Nintendo Switch, released on December 2, 2022, was a minor technical patch. It did not include new story content, which instead arrived later through free content waves in 2023. Update 1.1.1 Key Fixes

This update focused on resolving two specific bugs on the Starfall Islands:

: It corrected a bug where a completion icon on Chaos Island remained locked even after the player finished the associated activities. Story and Content Evolution

: It resolved an issue where the Kronos Island Titan boss (Giganto) would sometimes disappear after a player reattempted the fight.