Sonic the Hedgehog (Sega Master System, Game Gear)

This page details development materials of Sonic the Hedgehog (Sega Master System, Game Gear).

Early Songs#

In 2010, composer Yuzo Koshiro released Yuzo Koshiro EarlyCollection 2nd+. These appear to have been made using his PC-88, with FM square wave and noise instruments present. In regards to the 8-bit Sonic 1, the collection included early versions of six songs:

Title	Audio	Notes
Bridge Zone		A bit faster than the final.
Jungle Zone		Has more reverb than the final.
Labyrinth Zone		Slightly different.
Scrap Brain Zone		Slightly faster than the final.
Boss		Has a drum part in the beginning that is not in the final. The track as a whole is slower than the final.
Bonus Stage		Has more reverb than the final. The part that occurs before the loop has a different instrument.

Scrapped Tracks#

More notably, the Yuzo Koshiro Early Collection Box included five songs composed for the 8-bit Sonic 1 that aren't present in the final ROM.

Title	Audio	Notes
Dash! Jump! Spin! Attack!		Possibly an early boss theme, given the similarities.
Let's Have a Break		Possibly meant for the end of act score tally screen (which is silent in the final game) or for the overworld map, given the name and short length.
Turn on the Runway		Possibly an early Sky Base Zone theme, given the similarities. It also seems to abruptly end, likely implying Yuzo never got very far into composing it.
Be Careful		Might have been used in some sort of cutscene.
Warning		Same as above.