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 patch is a gameplay overhaul for Sonic The Hedgehog which gives each Chaos Emerald unique abilities that stack.

A simple save function has also been implemented.

How it Works:
Each emerald you obtain from bonus stages will give the player new abilities.

These abilities are as follows:
First Emerald
Player 1 Gets one extra hit point per life before losing rings. (Does not stack with shields)
Second Emerald
Special stages are now always open regardless of ring count.
Third Emerald
Player 1 now has faster acceleration.
Fourth Emerald
Player 1 can stay underwater for extremely long periods of time.
Fifth Emerald
Player 1 now earns double rings in normal stages.
Sixth Emerald
Player 1 can now jump higher.

Extra Modifications:
*Spindash added
*Spike bug fixed
*Speed cap bug fixed

SRAM:
Saving:
Game saves at each title card screen transition.

Loading:
At The Title Screen, Hold B and Press Start.

Game Saves:
Current Level and Act
Current Emerald Count

NOTE:
*Game will restart if no prior game save is detected. This is intentional as a checksum system in place.
*Game does not save on Green Hill Zone Act 1 to prevent accidental save overwrites.

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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