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 for Sonic the Hedgehog 2 for Sega Genesis. It combines the levels of Sonic the Hedgehog and Sonic the Hedgehog 2 to make one large game. Special stages from both games are accessible and are entered via each game's special stage original entry method. This means Giant rings at the end of stages when retaining 50 rings in Sonic 1 and jumping into a circle of stars after passing checkpoints with enough rings in Sonic 2. There are 6 Chaos Emeralds in the Sonic 1 special stages and 7 in the Sonic 2 special stages. Super Sonic is not available until all Chaos Emeralds are obtained from both kinds of special stages. Progress is saved automatically to SRAM.

Pressing Start and the A button while playing any stage will return the player to the title screen. Also, level select is available by holding A button then pressing Start at the title screen.

Arena mode is playable which has time challenges that can be completed to increase the players ranking. Higher rankings are obtainable in harder levels and have shorter time limits.

Some features of this game were later incorporated in flamewing's Sonic Classic Heroes hack.

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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