Sonic the Hedgehog CD (Aug 1, 1993 prototype)

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Title Screen
Sonic the Hedgehog CD (Aug 1, 1993 prototype)
Build date Aug 1, 1993 16:24:41
Dump status Released
Dumped by drx
Released by drx
Origin CD-R
Labels Sonic CD 8/1/93 ver 1.05
Dump method CloneCD (3 dumps, drive: DS8A8SH)
Ownership drx (2017-Present)
Game Sonic the Hedgehog CD
System Sega CD
Genre Platform
Final build JP Aug 6, 1993
EU Aug 27, 1993
US Oct 12, 1993
Release date JP Sep 23, 1993
EU Oct 1, 1993
US Nov 19, 1993
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A late prototype of Sonic the Hedgehog CD for the Sega CD.

Notes

The Cutting Room Floor research
This prototype has a research article on TCRF.
  • Level select can be activated at the title screen by pressing B
  • Minor code changes in all files.
  • Wacky Workbench Act 2 (Past and Good Future) and Stardust Speedway Act 2 (Present and Good Future) contain the most differences in this build (R62B, R62C, R72A, R72C).

Quartz Quadrant Zone Act 3 (R53C__.MMD, R53D__.MMD)

The boss in both good and bad future has a different color

Good Future

Bad future

The background in Bad Future starts higher than in the final.

Visual mode (VM____.MMD)

In builds 712 and 801, there are 5 patterns that are loaded into the same place in Video RAM in succession (overwriting each other). The last pattern (#5) is changed between 712 and 801, fixing the OPENNING typo. Patterns #1-#4, which presumably show the development progression of the Visual Mode are removed in the final, leaving only pattern #5.

Pattern 712 801 Final Image
#1 ✓ ✓ Sonic CD VM text 1.png
#2 ✓ ✓ Sonic CD VM text 2.png
#3 ✓ ✓ Sonic CD VM text 3.png
#4 ✓ ✓ Sonic CD VM text 4.png
#5 ✓ Sonic CD VM text 5 712.png
#5 ✓ ✓ Sonic CD VM text 5.png

OPENNING typo

  • 712

    712

  • 801 / Final

    801 / Final

Screenshots

  • Title screen

    Title screen

  • Stardust Speedway Zone Act 2 (Present)

    Stardust Speedway Zone Act 2 (Present)

  • Palmtree Panic Zone Act 1 (Present)

    Palmtree Panic Zone Act 1 (Present)

  • Wacky Workbench Zone Act 2 (Past)

    Wacky Workbench Zone Act 2 (Past)

  • Wacky Workbench Zone Act 2 (Good Future)

    Wacky Workbench Zone Act 2 (Good Future)

  • Stardust Speedway Zone Act 3 (Good Future)

    Stardust Speedway Zone Act 3 (Good Future)

Videos

Origin

  • Disc front

    Disc front





Sonic the Hedgehog CD prototypes
PC
PlayStation 3
Sega CD


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