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9.6 years
since unearthing of prototype ROM
15.7 years
since release of Sonic 2 on MegaDrive
1.9 years
since renaming to S2B
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Hill Top Zone can be accessed by choosing Scrap Brain Zone from
the level select screen. The level is only partially playable, as
we'll soon see.

These lifts aren't fully functional yet. The platforms don't fall like
they're supposed to. |

Lava isn't painful yet. |
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Notice the green orb on the end of the lever there... |

Whoa, wait, where'd this come from? Did Sega Visions
get the same prototype as we did? It's impossible to tell from this one
screenshot (the only one we have from Visions), but the two shots
do look awfully similar. |

Lifts are definetly broken. |

This one's stopped before reaching the bottom of the line. Oops.
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And finally, a tunnel leading to death. There actually is more level underneath
here, but the developers hadn't changed the screen limits yet. |
Prototype B

Final ROM

There are clear differences in the level's layout between prototype B and the final
game. In this layout dump, we can also see the inaccessable area after the second tunnel.
Layout dumps courtesy Sonic CulT, copyright Sazpaimon. |

Slope detection doesn't seem to be working properly. |

No objects have been placed either. |

In fact, the entire second collision layer is missing. It's obvious
that this Act was in early beta. |

Hmm... what happens if I start walking forward... |

WHOOPS, CRASH!!! But why did that happen? Remember that Sonic 2 is based
off the Sonic 1 code, and at this point in Sonic 1, Robotnik would jump on a
button and the floor would fall out, sending Sonic to Act 3. The data for
this event no longer exists, and when the program attempts to load it, it
freaks out and crashes. The exact same thing will happen if you attempt to
play Final Zone, and for the exact same reason. |
Prototype B

Final ROM

The differences here are much more marked than in Act 1. More evidence to show that
this Act was in its early design phase.
Layout dumps courtesy Sonic CulT, copyright Sazpaimon. |

Not much different from Labyrinth Zone, now is
it. Remember that Scrap Brain Zone 3 used graphics from Labyrinth Zone, and those
are now missing, so you get the same result here as you would if you actually
tried to play Labyrinth Zone. Note that if you use edit mode to move to the right
and over the top of the screen, you'll be taken to Final Zone. |
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