- Back to: Sonic the Hedgehog CD (Mega-CD prototype; 1992-12-04).
General comparisons
The v0.02 prototype has a Sega screen, complete with the classic jingle. This was removed from the final, likely as the Mega-CD BIOS already does the work in this regard.
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v0.02 prototype
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The title screen was overhauled for the final game. In the v0.02 prototype, "CD Sonic the Hedgehog" uses a 320x224 screen resolution (versus 256x224) and lacks the scaling cloud effects. There is also no introductory animation, just a simple fade in.
The animated introduction has a different border, with the text "開発画面" (Kaihatsu Gamen, which literally translates to "development screen"). It also runs slower than the final game.
The Time Attack screen is a very early design compared to later prototypes and the final game, with extremely basic graphics. Only Palmtree Panic Zones 1 and 2 can be selected here, and the Round is referred to as "Salad Plain".
The scrapped R2 is also listed on this screen. All other known versions of the game skip from R1 (Palmtree Panic) directly to R3 (Collision Chaos).
Gameplay comparisons
You Say! A likely pun on Yuusei Sega World, signposts do not spin nor make a noise when Sonic passes past them, but the computer does force him to travel right. There is no score tally.
Time travel looks very different to the final game. It also plays an ear-grating noise that would be used in the 510 and 512 prototypes before being changed twice over the game's development.
Graphics comparisons
Sonic uses spring animations similar to the original Sonic the Hedgehog rather than the "spinning" ones seen in the final Sonic CD. They even corrected the missing white stripe from the original sprite.
The "I'm outta here" Easter egg uses completely different graphics.
Level comparisons
References