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.

This is a hack of Sonic the Hedgehog for the Sega Genesis. It attempts to recreate features of the much disliked Gameboy Advance port of Sonic 1 called Sonic the Hedgehog Genesis. The hack has the following features:

*Physics which closely match those of the GBA game, noticeable during Eggman boss confrontations as it is possible to bounce of the top of him.
*Spin Dash which has slow animation and dust that appears slightly before the spin starts.
*Background effects, like moving clouds.
*Various bug fixes.
*Skippable score countdown, momentum preservation, "Press Start" text on title screen.
*Sonic's sprite art and the life counter text are replaced with the different art from the GBA port.
*All springs double Sonic's max speed until landing after being airborne. All side-facing red springs act like yellow springs. To compensate for the lower speed, slope repel calculations aren't performed after hitting a spring. Vertical springs erase all horizontal velocity not in a direction being pressed.
*New feature: the scrolling is changed to give a better sense of speed and Sonic CD-style lookahead (not in the GBA port).

The patch is in xdelta format. The ROM should be in BIN format.

Sonic The Hedgehog (USA_ Europe).md - NOINTRO
CRC32: F9394E97
MD5: 1BC674BE034E43C96B86487AC69D9293
SHA-1: 6DDB7DE1E17E7F6CDB88927BD906352030DAA194
SHA-256: 46160BAA06362C711C9F1A5017CB7371026444936C8AF5E93A78996CF32FF2A6

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