Proto:Sonic 3D Blast (Genesis)/819 Prototype

Prototype 819 of Sonic 3D Blast, dated August 19, 1996, was released by drx twice – once from a cartridge in October 2006, and again during the February 23, 2008 proto release.

The two dumps are identical, except for some weird values before the country code; this is also the first prototype to be fully playable.

General Differences

 * The old "Sega" sound is still present, although it now has the final's effect of letters zooming out.
 * The intro FMV is still missing, and there are still no game demos (the game attempts to play some, but can't).
 * Several placeholder screens, such as "GAME COMPLETED WITH(OUT) ALL CHAOS EMERALDS SEQUENCE WILL GO HERE" and "CHAOS EMERALD COLLECTED SCREEN WILL GO HERE."
 * The development text from the Prototype 814 is still present.
 * Pressing A while the game is paused will skip to the next Act.
 * The Special Stages have been implemented, although the ring requirements are 60-120-180 rather than the final's 50-100-150.
 * Level Select is activated by default.
 * The player gets bonuses for the Flickies as well as Knuckles and Tails' bonus stages, even after bosses.
 * If the player takes more than 10 minutes in an Act, the game displays "9:59" instead of "Too Long".
 * All bosses still use the Final Fight music.

Aesthetic Differences

 * The font used for title cards and the "Press Start" text is still as it was in Prototype 814, although it is now also used in the Level Select.
 * Title screen remains as it was in the previous two prototypes.

Rusty Ruin Zone

 * Some of the springs are missing.
 * Act 2 still plays Act 1's music.

The Final Boss (The Final Fight)

 * After beating the boss, the game shows a regular "Sonic got through Act 1" screen.

Unused Music
Two unused tracks can be found in this prototype:

An upbeat tune whose purpose is currently unknown. It's possible this was intended for a Special Stage.

A slightly less developed version of the unused tune in Prototype 825.