Sonic the Hedgehog 2 (Nick Arcade prototype) - Walkthrough

The Sonic the Hedgehog 2 "Nick Arcade" Prototype is a prototype build of Sonic the Hedgehog 2 for the Sega Mega Drive. It stands as the earliest version of the game to be found and released onto the internet, likely created during the first half of 1992.

While perhaps unlikely to have been built for the show, this release is commonly referred to as the "Nick Arcade" prototype due to its appearance in two 1992 episodes of Nick Arcade - the first sightings of the prototype by the Sonic the Hedgehog community. It is also known to have been shown in issues of Sega Visions and, potentially, a behind closed doors press-only event at Summer CES 1992.

The Nick Arcade prototype is a very early version of the game. Only an untitled Emerald Hill Zone can be played normally, with a further five zones accessible only through a level select code. Much of the game still looks and plays like the original Sonic the Hedgehog - the level select screen is identical, and remnants of the original Green Hill Zone are still somewhat playable. Sonic 1 music is still intact, and the full Blue Sphere game is available when locked on to Sonic & Knuckles.

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