Sonic the Hedgehog 2: Sonic the Hedgehog - The Lost Worlds

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.

Sonic the Hedgehog - The Lost Worlds

Credits: ExecByte

Sonic The Hedgehog: The Lost Worlds is a hack of Sonic the Hedgehog 2. This hack features all of the zones that were cut from Sonic 2 during development. Some zones have been ported from the Sonic 2 Simon Wai prototype and then finished up, and some have been created based on magazine pictures and information from interviews with people who worked on Sonic 2.

==Levels==

*Dust Hill Zone
*Rock Zone - The music is Mystic Cave Zone 2 player.
*Wood Zone - The music is the beta version of Metropolis Zone.
*Winter Zone
*Hidden Palace Zone - Background music is the intended music for the level. Mystic Cave boss is used with the only alteration that the sequence of picks and rocks is omitted. Also, the bat badniks are utilized, which ended up being unused in the final Sonic 2.
*Casino Night Zone (Sonic 2 beta style) - Music is the beta music.
*Cyber City Zone - The music is 2 player Casino Night Zone.

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