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 is a hack which adds levels that were scrapped from Sonic the Hedgehog 2 for Sega Genesis. The levels in the hack are listed below:

*Emerald Hill Zone
*Chemical Plant Zone
*Aquatic Ruin Zone
*Casino Night Zone
*Hill Top Zone
*Wood Zone: (scrapped from final release)
*Dust Hill Zone: This version switches between both desert and winter settings. It's probably meant to be a fusion of Dust Hill Zone and the Winter level. (scrapped from final release)
*Oil Ocean Zone
*Genocide City Zone: Original graphics. (scrapped from final release)
*Hidden Palace Zone: (scrapped from final release)
*Metropolis Zone
*Sky Chase Zone
*Wing Fortress Zone
*Death Egg Zone: (original level)

The archive contains two patches, one for Sonic and Tails, and one for Knuckles as playable characters.

The patch is in xdelta format due to shifted data resulting in IPS patches containing original code. The ROM should be in BIN format.

No-Intro Name: Sonic The Hedgehog 2 (World) (Rev A)
ROM/File SHA-1: 8BCA5DCEF1AF3E00098666FD892DC1C2A76333F9

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