Sonic the Hedgehog 2 is a platforming action video game. Developed by Sonic Team and Sega Technical Institute in 1992, it introduces new mechanics to the series, and the lovable young fox known as Miles "Tails" Prower. The massively successful sequel to the original Sonic the Hedgehog, Sonic 2 stands as the second best-selling Sonic game in history, and is considered by many fans as the best Sonic game.

A 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). Alternatively, the player can also play as Tails, who either functions identical to Sonic. 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. The special stage, which is now a pseudo-3D tube, involves collecting a certain amount of rings and avoiding bombs.

Returning from his previous defeat, Dr. Ivo Robotnik plans world domination once again by kidnapping and converting animals into robots, and collecting the seven Chaos Emeralds. Unlike his previous frenzy with Sonic, Robotnik has built the Death Egg, a giant battle station orbiting the Earth, and intends to conquer with it. Sonic (now followed by Miles "Tails" Prower) set off to collect the Chaos Emeralds and defeat Robonik once and for all.

This patch is a gameplay overhaul for Sonic The Hedgehog 2 which not only overhauls
how to obtain Chaos Emeralds but gives each emerald unique abilities that stack.

A simple save function has also been implemented.

How it Works:
In addition to special stages, players can earn emeralds by gaining a continue at the end of each act.
Each emerald will give the player new abilities before obtaining Super Sonic form.

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
Player 1 can stay underwater for extremely long periods of time.
- Third Emerald
Player 1 now has faster acceleration.
- Fourth Emerald
Player 1 now earns double rings in normal stages.
- Fifth Emerald
Player 1 now earns double rings in both normal and special stages.
- Sixth Emerald
Player 1 can now jump higher.
- Seventh Emerald
Super Sonic now available.

NOTE:
While Tails cannot obtain Super Form as Player 1, he can gain the emerald abilities listed above.
Super Sonic form now requires 100 rings in order to activate.

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

Loading:
Enter the options menu, highlight player select and press start. Highlighting any other option will exit the options screen.

Game Saves:
Current Level and Act
Current Emerald Count
Selected Players (Sonic and/or Tails)

NOTE:
*Game will restart if no prior game save is detected. This is intentional as a checksum system in place.

Patching instructions can be found in the readme.

Database match: Sonic The Hedgehog 2 (World) (Rev A)
Database: No-Intro: Genesis (v. 20210226-213851)
File/ROM SHA-1: 8BCA5DCEF1AF3E00098666FD892DC1C2A76333F9
File/ROM CRC32: 7B905383

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