This is a sub-page of Proto:Sonic the Hedgehog 2 (Genesis). Five betas, labeled Beta 4 to Beta 8, are internal testing builds that were created as the Sonic the Hedgehog 2 project was nearing completion.. This a beta version supposedly leaked before the final release back in the 90s. I've been told this is a ROMhack demonstrating what the beta could have been.. Sonic the Hedgehog 2 is a platform game developed and published by Sega for the Sega Genesis console, released worldwide in November 1992. It is the second main entry in the Sonic the Hedgehog series, and introduced Sonic's sidekick, Miles "Tails" Prower, controllable by a second player.. A prototype of the game, dating from before Sonic 2 itself, was discovered on a Chinese Geocities site and has been widely distributed on the Internet as Sonic 2 Beta.. Here YouTuber Ghost Lost has a play through the new Sonic 2 HD Beta available for FREE DOWNLOAD – showcasing one of the best classic games, in a modern day High Def twist !!. Sonic 2 Beta. The image that sparked the biggest conspiracy in the Sonic community was a picture of a level select screen that no-one had seen before, found in the Official Sonic the Hedgehog 2 Guidebook..