For those not in the know, Sonic the Hedgehog 2 for the Genesis ended up as a very different game than it was supposed to. A dumped ROM from a beta cartridge as well as mock-ups images and interviews reveal that several things changed along the way.
For starters, there were some simple name changes like Green Hills -> Emerald Hills and Neo Green Hills -> Aquatic Ruins.
Some stages were removed after being started. The beta ROM allows you to see very preliminary version of the Wood Zone (taking place inside a forest with big leaves and huge tree trunks) and the now infamous Hidden Palace which looks like a cave with crystals and waterfalls.
Finally, some zones ended up being cut all together at various degrees of completion. First, we have a desert zone which was only featured in a mock-up picture and has been incorrectly referred as Dust Hill zone ever since. An interview also reveals that the zone was supposed to change into a winterland halfway through with Christmas trees instead of cacti. And finally, there was Cyber City which was then renamed Genocide City before being removed altogether before it was even started. A concept sketch shows that it would have been a high-tech zone with lots of mechanical traps, kinda like Metropolis but much more futuristic.
All of this is to introduce you to a fan project called
Sonic 2 Long Version, which is an attempt to recreate the game that Sonic 2 was supposed to have been. Of course, liberties were taken and it's still far from finished (most new stages feel quite incomplete and/or boring) but it's fully playable and can be finished. For example, Genocide City is actually completely new, using new graphics and takes place instead on top of a series of sky-scrappers and is a bit boring to me but it looks nice anyway. Dust Hill is my favourite so far because somehow, the graphics from that mock-up picture were either found or recreated and the level design isn't half bad, plus it does turn into a sorta winter zone halfway through.
In any case, if you want to try this special version of Sonic 2, you can find it at the following link:
http://www.sonicresearch.org/s2long/Enjoy!
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"With the first link, the chain is forged. The first speech censored, the first thought forbidden, the first freedom denied, chains us all irrevocably." [...] The first time any man's freedom is trodden on, we're all damaged. - Captain Jean-Luc Picard
B*tch, meet reality. Reality, meet b*tch. - Me