Sonic Chaos (Game Gear)

Tails is back as a playable character. Chaos!

Level Select


Press Up, Up, Down, Down, Right, Left, Right, Left, Start at the title screen.

Sound Test


Press Down, Down, Up, Up, Left, Right, Left, Right, 1, 2, Start at the title screen. Press Down, Down/Right, Right, 1 at the Sound Test, and Sonic will perform a Hadouken.

Unused Music
Sound Code:

Unused jingle of unknown purpose.

Sound Code:

While not used here, this track would be recycled (albeit at a lower pitch) in Sonic Triple Trouble as the Sunset Park boss theme.

Unused Text
A build date string can be found in the ROM at :

Regional Differences
The title fonts are different between versions. The larger title screen in the international version moves the "Press Start Button" text down 8 pixels. The international version also gets a trademark to go with its copyright.

The title card fonts are completely different between regions. Notably, the international version does not have act numbers in its font. "Gigalopolis Zone" was shortened to "Gigapolis Zone"