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 of Sonic the Hedgehog 2 which allows Sonic, Tails, and Knuckles to play simultaneously in any level from Sonic 1 and 2. All characters retain their moves and abilities from Sonic 3 & Knuckles. Save game and shield abilities from Sonic 3 & Knuckles are also present. The original shield gives Sonic the ability to perform a air/dash by pressing jump while in the air. Sega Multitap compatibility is implemented allowing up to 3 people to play at once. An extensive list of features of the hack can be found in the readme.

The game was formerly known as Sonic 2 Heroes before ColinC10 became involved and helped port over Sonic 1 levels. Some features of this hack were first seen in ColinC10's Sonic 1 and 2.

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

==v0.10.008a==
Version 0.10.008a adds the ability to play as Espio, Charmy, and Vector from Knuckles Chaotix.

Database match: Sonic The Hedgehog 2 (World)
Database: No-Intro: Genesis (v. 20180824-045026)
File/ROM SHA-1: 14DD06FC3AA19A59A818EA1F6DE150C9061B14D4
File/ROM CRC32: 24AB4C3A

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