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Proto:Sonic the Hedgehog 2 (Genesis)

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This page details one or more prototype versions of Sonic the Hedgehog 2 (Genesis).
Warning, as there may be people fooled by this: The so-called "Beta 3" is actually a hoax created by Sonic fan scene member Shadow05 (AdvancedPlayer).

There are many interesting things in the prototypes of the Genesis Sonic the Hedgehog 2, most of which were sadly removed as development progressed. Most of these are very late in development as a result of being part of Sega's Quality Assurance BBS archives.


Nick Arcade Prototype
Very early build using many Sonic 1 resources. Named for being near-identical to the build used on the game show Nick Arcade in 1992.
Simon Wai Prototype
Considerably more fleshed out, but still far from complete. Named after the person who discovered it in 1999, Simon Wai.
CENSOR Prototype
A sort of "missing link" between the Simon Wai build and Beta 4. Named after the scene group that had leaked it about two weeks before the final game's release, CENSOR.
STH 2 Prototype Beta 4 Title.gif
Beta 4 to Beta 8
Internal testing builds that span the last two weeks of development.

General Notes

Cartridge Header

Almost all prototype versions borrow the header from Sonic the Hedgehog, with the only tweak being a 2 added for the titles. This was only changed to the final version's header in Beta 8. The Nick Arcade and Simon Wai versions use Sonic the Hedgehog's serial code, while all the beta versions have Sonic 2's serial code.

Tails Glitch

If Tails jumps and hits an enemy after Sonic dies, the score will continually increase until the fade-out. This happens because, while all Badniks are frozen and can't be destroyed when Sonic dies, Tails can keep moving, get stuck in an enemy, and continuously gain points – a bug that (as seen in the video at right) awards 1,452,800 points and nearly 30 extra lives.

This bug is mostly present in CENSOR and above, but can be done in just about any prototype version. It was fixed in the final by having Tails immediately go into his flying animation when Sonic dies, but can still be done in the final version due to another bug.

When going up slopes with Tails' AI, if Tails does not successfully make it, its AI will walk back to a stop and then attempt to spin dash up the slope. If Sonic dies during this time, Tails will continue performing this action until the Spin Dash is released, which then puts him into the flying animation described previously. If you take Player 2's controller to control Tails after Sonic dies and before Tails' scripted action finishes, you will have full control of Tails until the game fades to black, allowing this bug to occur when Tails jumps into an enemy, racking up massive points and extra lives.