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 fixes Green Hill Zone's collision errors in the recently discovered early prototype of Sonic the Hedgehog 2. You must select Green Hill Zone from the level select menu (code below). This hack also enables Tails in Emerald Hill Zone.

Level Select Code:
Up, Down, Down, Down, Down, Up, A+Start


Minor problems with this patch:
[list][li]Act 2 doesn't load the proper end-of-level art[/li]
[li]The graphics for Robotnik in Act 3 aren't loaded[/li]
[li]All level changes caused by porting to Sonic 2's engine still exist[/li][/list]

Patch this to a copy of Sonic The Hedgehog 2 (Early prototype) (dumped by hidden-palace.org).bin.

Sonic_The_Hedgehog_2_(Early_prototype)_(dumped_by_hidden-palace.org).bin
CRC32: 39FAAA70
MD5: A460BF633579A80EEBBC09D6809E1B09
SHA-1: 5B51B4D98CB4A7A38157DC4AB9462164DD224BFD

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