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.

Despite the hack name, this is a hack of Sonic the Hedgehog 2 for the Sega Genesis and not a hack of Sonic 1. The hack incorporates levels which were scrapped before the game was released. The levels are recreated using information gathered from either prototype ROM releases, scrapped data from the final ROM, information found in interviews, game screenshots, or concept art. Unlike other lost level restoration hacks this hack only incorporates the lost levels and no other levels are included aside from the prototype version of Casino Night Zone.

==Levels==

*Dust Hill Zone: Based off the single mock-up image found in magazines.
*Rock Zone: Based off info found in a piece of concept art.
*Wood Zone: Based off the design found in a prototype.
*Winter Zone: Based off info from an interview. Includes Christmas trees.
*Hidden Palace Zone: Based off design found in a prototype. Uses the intended music found in the final version of the game.
*Casino Night Zone: Based off the design found in a prototype. Uses the music found in the prototype.
*Cyber City Zone: Based off a piece of concept art.

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

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