Sonic the Hedgehog is a platforming action video game. Developed by Sonic Team in 1991, the blue blur himself would become one of gaming's universal icons, and became the first series to stand as a serious rival to Nintendo's Mario series, flaming the legendary console wars.

A classic 2-D side-scrolling platformer, you control Sonic, a blue-colored hedgehog that runs pretty darn fast across the stages (zones as they are called in the game). Scattered throughout the zones are golden rings that Sonic can collect, which allows him to not only take damage, but allow access to special stages. If completed, the special stage will grant Sonic one of six Chaos Emeralds.

Dr. Ivo Robotnik, an evil genius, realizes the power of the Chaos Emeralds, and wants them for himself. As such, Robotnik traps the innocent woodland creatures of South Island. In response, Sonic attempts to free the creatures and collect the emeralds for himself in order to stop Robotnik's plans.

Highlights for version 3.0:
[list]
[li]All level layouts edited (some complete; others pending).[/li]
[li]Each character now has a unique set of moves (though Sonic and Shadow share the homing attack).[/li]
[li]Most levels (not all) have a small intro, ala S3K, where they perform some sort of action when starting the level i.e, running in from the left.[/li]
[li]Loads of music edits.[/li]
[li]There is now a "preferences" screen, where you can customize certain aspects of the game (suggestions are welcome).[/li]
[li]Cheat codes have been changed - figuring them out will grant you access to a new, special level select (which is a bit buggy - just don’t hit left/right on zone selections =P).[/li]
[li]"Original Mode" allows you to play the original levels from Sonic the Hedgehog, using all of the additions from Sonic Megamix (such as bug fixes, moves, preferences, etc). There is also a separate save slot for a character’s original mode.[/li]
[li]Title screen demos have been edited. Credits demos have not.[/li]
[li]Super forms have been added.[/li]
[li]Elemental shields, ala S3K, have been added.[/li]
[li]Credits have been edited; each character has a unique end pose on the ending sequence.[/li]
[li]Various other changes. See the Wiki page for more info.[/li]
[/list]

This is considered a "complete" release, although not "final". It was succeeded by an incomplete "4.0b", which was ported to SegaCD, and further changes have been implemented since, although a "final" release and its date are tentative. More information can be found on the Manual/Wiki page, located at here: http://www.headcannon.com/TeamMegamix/index.php?p=mm_home.

For a complete list of authors, please see: http://www.headcannon.com/TeamMegamix/index.php?p=team.

Note: Apply xdelta patch to US Genesis Sonic 1 ROM. The patch is in xdelta format due to shifted data which resulted in a IPS patch almost the same size as the patched ROM.

Database match: Sonic The Hedgehog (USA, Europe)
Database: No-Intro: Genesis (v. 20210226-213851)
File/ROM SHA-1: 6DDB7DE1E17E7F6CDB88927BD906352030DAA194
File/ROM CRC32: F9394E97

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