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From Sonic Retro

The Sonic 3D Beta is a prototype Sega Mega Drive/Genesis ROM purchased for $700 by the Sonic community and dumped by drx in October 2006. It claims to be a 70 percent complete version of Sonic 3D: Flickies' Island, though it's estimated to be closer to 95 percent. This proto is very similar to the 819 version, only with some weird values added before the country code.

Download Sonic 3D (cartridge prototype) File: Sonic_3D_Blast_(Beta).rar (1.60MB) (info)

Various Differences

Startup

• Different "SEGA" sound at the beginning
• The title screen refers to the E3 demo cartridge, even though it isn't the actual E3 demo.
• Ending sequences/Chaos Emerald collection screens are missing and have a filler screen instead.
• Pausing the game then pressing A proceeds to the next level, in the same way the level select does in the final.
• Collecting 100 rings gives you an 1-UP only if you get exactly 100. Using a 10-rings box to go beyond 100 won't work.
• Various changes in level design and layout.

Music

• Various pieces of music are used in in both acts: Rusty Ruin uses Act 1 music, Volcano Valley uses Gene Gadget Act 2 music, Gene Gadget uses Act 1 music, Panic Puppet uses Act 2 music and bosses use the final level music.
• Two pieces of lost music have been found

Other

• Other loading screen / title card fonts

Physical Cartridge

(from drx's Hidden Palace)

In-Game Screenshots

External Links

• Release post at Hidden Palace

The Sonic 3D Beta topic, updated with in-game shots