Sonic Frontiers/Hidden content

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Idle chatter

If Sonic is left idle for upwards of 10 minutes, he will make a comment on his current surroundings. Some of these comments reference characters and events from other Sonic games and comics (e.g. Tangle the Lemur). As these require waiting for long periods it is very unlikely to hear these comments in regular play.

Unused content

Art

Art	Description
	A save file banner for the final battle against The End. Found in ui_common.pac as uiRANGE_savedata_6.dds.
	A Homing Attack skill icon for Tails. Goes unused as Tails does not have the Homing Attack in his skill tree. Found in ui_gamemodestage.pac.

Early Kronos Island

Inside the files of the Nintendo Switch version of Sonic Frontiers, there is an early version of Kronos Island, but with the additional layouts of Rhea Island and Ouranos Island attached to the top. These islands were originally one, huge area as seen in the announcement trailer in December 2021. The island was split later in development following criticisms of the island being "too big" and "boring" from playtesters.

By using debug cheats, the player can still see the outline of Ouranos Island on the final version of Kronos Island.

Artwork	Name	Description
	Final and Beta	(Top) The outline of Ouranos found on the final version of Kronos. (Bottom) The full Krouranos map, found in the game files of the Nintendo Switch version of the game.
	Mockup	A fan-made mockup of what the map screen for the island could have looked like.

Sonic Forces leftovers

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Various leftover images from Sonic Forces can be found in "image/x64/raw/ui/rpl_texture" in the game's directory.