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Sonic the Hedgehog 2 (Nick Arcade prototype)/Comparisons/Marble Zone

From Sonic Retro

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Chemical Plant Zone exists in this prototype, but is not accessible during normal play and is referred to as "Marble Zone" in the level select menu. Nevertheless, a demo was recorded for this stage, so leave the controller long enough on the title screen, and you'll see Sonic and Tails navigate the first section of act 1.

Act 1

Z dcp01.png
Nick Arcade prototype
Sonic2 MD Comparison CPZ Act1Start.png
Final game

At first glance the stage looks pretty ordinary. Most of the graphics are here and there are some objects too.

Z dcp02.png
Nick Arcade prototype
Sonic2 MD Comparison CPZ Act1BG1.png
Final game

The key difference? The background is pink! It also lacks any animation, save for a few rotating palettes.

Z dcp03.png
Nick Arcade prototype
Sonic2 MD Comparison CPZ Act1BG2.png
Final game

Some differences aren't as obvious, such as the lower building in the background.

Z dcp04.png
Nick Arcade prototype
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Final game

The demo takes the high route, which it needs to avoid this dead end. Aside from being non-functional, it appears the tubes were meant to be accessed from the side, rather than the top.

Z dcp05.png
Nick Arcade prototype
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Final game

These speed boosters don't work at all.

Sonic2NA Comparison CPZ Act1Loops.png
Nick Arcade prototype
Z cp04.png
Final game

The loops have slanted edges.

Sonic2NA Comparison CPZ Act1Collision.png
Nick Arcade prototype
Notavailable.svg
Final game

Take the high route and eventually your luck will run out. The collision hasn't been set up properly for the latter half of the stage, so Sonic and Tails will fall through the floor and get stuck.

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Nick Arcade prototype
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Final game


Act 2

Sonic2NA Comparison CPZ Act2Start.png
Nick Arcade prototype
Sonic2 MD Comparison CPZ Act2Start.png
Final game

Act 2 shares the same layout as act 1, the only difference is Sonic and Tails start inside a wall.

Sonic2NA Comparison CPZ Act2Rings.png
Nick Arcade prototype
Notavailable.svg
Final game

There are no objects this time, but there are some curiously placed rings.

Act 3

Sonic2NA Comparison CPZ Act3Start.png
Nick Arcade prototype
Notavailable.svg
Final game

Again, no change to the level layout in act 3, but this time Sonic and Tails start above ground.

References


Sonic the Hedgehog 2 (Nick Arcade prototype), prerelease version of Sonic the Hedgehog 2 (16-bit)
S2b title.png

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Part of Sonic the Hedgehog 2 (16-bit) development