Proto:Sonic 3D Blast (Genesis)/814 Prototype

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Download Sonic 3D Blast (814 Prototype) File: Sonic 3D Blast (814 Prototype).bin (4 MB) (info)

Prototype 814 of Sonic 3D Blast, dated August 15, 1996, was released by drx during the February 23, 2008 proto release. It is the first prototype to contain all seven zones.

General Differences

• The Sega logo still has the old "Sega" sound, and still shatters at the end.
• The intro movies are not yet implemented.
• No level select is available.
• No game demos play. The game attempts to play some, but is unable to.
• Each level now has its own music track, but some music tracks haven't been put into any of the levels yet.
• Knuckles and Tails are present and will take your rings, but the Special Stages have not yet been implemented.
• Pressing A when the game is paused will skip to the next level.
• The level complete screen is very basic, with no final score tally.
• Losing all of the player's lives results in getting sent back to the Sega logo.
• All bosses play the Final Fight music.

Aesthetic Differences

Prototype 814 - 819	Prototype 831 - Final

• Title screen is the same as Prototype 73, albeit with the "Press Start" text flashing present below the logo.
• The font uses a thicker stroke for the title cards and the "Press Start" text:

Prototype 814 - 819	Prototype 825 - Final

To do: Replace with a proper transparent spriteset.

Level Differences

Green Grove Zone

• As with Prototype 73, the floor tiles are brighter.
• Just like Prototype 73, a blue shield at the start is in place of a gold shield.
• Act 2's music is missing a section.

Rusty Ruin Zone

• Ballerina spinning thing still doesn't make you invulnerable against enemies.
• Act 2 plays Act 1's music.
• Act 1's music seems to be shorter than in the later prototypes and final version, with slight changes to the instrumentation.

Prototype 814 - 819	Prototype 825 - Final

Spring Stadium Zone

• A corrupt piece of ground can be found near one of the Fish in Act 2.
• A blue shield replaces the gold shield in Act 2.

Diamond Dust Zone

• Act 2 plays Act 1's music.

Volcano Valley Zone

• The gold tiles are instead a light red.
• Both Acts use the music from Gene Gadget Act 1.
• An unfinished version of Act 1's music is unreferenced within ROM.

Prototype 814	Final

Gene Gadget Zone

• Both Acts use Act 1's music.
• As with Rusty Ruin, Act 1's music here is also shorter than in later prototypes and the final version.

Prototype 814 - 819	Prototype 825 - Final

Panic Puppet Zone

• Both Acts use Act 2's music.
• After beating the boss, a screen saying "To Be Continued..." appears and the game resets.

(Source: Sonic Retro)

Leftover Development Text

• At 0x3F00FE, there is a string that says "NOSEGAY is a word (c)T-SN1993MARPSY-Q TARGET". This phrase is designed so that the cartridge can pass TradeMark Security System.
  • "Nosegay" is in fact a word; it's defined as "a small bunch of flowers, typically one that is sweet-scented."
  • "NOSEGAY" contains "SEGA" as a substring and this string is aligned to be used as a ROM header. Someone's joke, presumably. (Psy-Q was a development kit.)
• In addition, some development text can be found at 0x3F0871:

E E EOK
Cannot detect SCSI interface
Scratchpad RAM is faulty
Emulation RAM is faulty

Press RESET on console to restart

SCSI ID =
SCSI Interface:
Scratchpad RAM:

DETECTED GOOD FAULTY!

...and at 0x3F1DE2:

C:\PSYQMD2.BIN
Quick RAM test : 
Emulation RAM  =
Testing Emulation RAM...$
Emulation RAM failed at $
RAM refresh failed at $
SEGA Genesis Development Interface
Rev. 68000
MEGADRIV2.04