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Sonic News Network
Sonic News Network

This article pertains to the beta elements of Sonic the Hedgehog 3.

Red revolving Spheres


This is a spinning mass of Red Spheres, placeable via Debug Mode in the first half of Angel Island Zone Act 1. The spheres look similar to those appearing in the Special Stage, but the object itself seems to have no apparent gameplay purpose. When it is placed, many palette and VRAM complications occur in the level, and the game will lag. Player 2 can manipulate this object.

These Red Revolving Spheres were originally going to appear in an early version of the Special stages.

  • Up - rotates the object vertically.
  • Right - rotates the object horizontally.
  • Down / Left - moves the object up or down.
  • A / C - changes the object's size.
  • B - rotates the object sideways.
  • Start - toggles automatic rotation.

Leftover menus

These unused graphics were ripped right out of Sonic the Hedgehog 2.

Image Description
The options menu with all them being selectable.
The menu screen for the VS Mode. However, selecting any of the Zones on this screen will send the user back to the title screen.
Graphics from the results screen menu.

Unused objects

Artwork Name Description
Foreground Tree Sprite Although it makes a similar appearance to the trees seen at the end of Angel Island Zone Act 2 where Robotnik flies through the forest, this is actually a separate object entirely that goes completely unused as it was meant to be placed in the foreground. The graphics are located with the unused switch graphics. It can be placed with Debug Mode.
S3 - Button.png
Button A button with unknown purpose. It can be placed in Carnival Night Zone via Debug Mode but does nothing when pressed.
S3 - Block.png
Breakable block This block glows and is breakable by jumping on it. It can be placed in IceCap Zone via Debug Mode.
S3 - Wall.png
Breakable wall This wall is breakable by rolling into it. It can be placed in Angel Island Zone Act 2 via Debug Mode.
S3 - CSpikes.png
Competition Mode spikes A set of spikes for Competition Mode. Such objects do not appear in any of the five courses but they can be placed there with Debug Mode.
S3 - UnusedRing.png
Unused Ring object An unknown object that appears to spawn slope collision when placed.
S3 - Lift.png
Unknown platform A platform with messy graphics shaped as similar to a top is defined as object ID 12. It does not really fit in with any Zone, but may have been created for Launch Base as its ID is located near objects used in that stage.
S3 Cannon 1A.png
Cannon A cannon-like object with undefined graphics. When touched, it locks the player to the center of the object; the faster the player runs, the further they are thrown after exiting it.
S3 Spinning Structure 1C.png
Spinning structure A curious object that damages the player if hit from above, but swings from side to side if hit from below. Its graphics have not been found, and its animation resembles something turning.
S3 platform unused 1D.png
Grabbable platform A normal platform with a grabbable bottom. Its graphics seem to fit Launch Base Zone the best.
S3 Debug damage area 27.png
Leftover lava damage object This object was used in Sonic the Hedgehog and Sonic the Hedgehog 2 to damage the player when they touch lava, but does not work here. It is possible to change the size of the area by modifying its variable.
Sonic the Hedgehog 3 Flying Battery spring.png
Horizontal Spring Since Sonic the Hedgehog 3 does not have any sections using this object, it goes unused until Flying Battery Zone of Sonic & Knuckles.
N/A Big Sonic on Sega screen (Sonic the Hedgehog 2) There is leftover code from the large Sonic on the Sega screen in Sonic the Hedgehog 2. The object seems to be a fairly old leftover as it is still using the old object format of that game as the graphics seem to have been completely removed.
N/A Shield object The original shield from Sonic the Hedgehog and Sonic the Hedgehog 2. It is unknown whether or not this is simply a leftover, or if it was originally planned for the game. It is worth noting that the shield sound from Sonic the Hedgehog 2 remains unused in the sound test.
N/A Unused Sonic & Knuckles Mapping Data The game has remains of some leftover sprite mapping data for Sonic & Knuckles objects, largely consisting of Badniks that would have appeared of the Zones in that game.
N/A Other unused objects
  • Objects 8F-98 delete themselves when loaded. One of these objects is used in the Mushroom Valley object layout, suggesting that they were once objects that belonged to the Sonic & Knuckles Zones.
  • Objects 6F-7F are represented as Rings in Sonic the Hedgehog 3 and were apparently removed manually, but in Sonic 3C (prototype 0408), these IDs belong to objects from Flying Battery Zone.
  • Object 84 is another unused and removed object, according to the 3 November prototype. This object was an early version of Hey Ho boss from Mushroom Hill Zone Act 1.

Unused sprites

Artwork Name Description
S3 - StaticMonitor.gif
Static Monitor An unused animation for a Monitor with static effects.
S3 - SMonitor.gif
S Monitor An unused sprite for Monitor with the S item.
"Bored" Animation Sonic in his signature "waiting" pose, but instead of pointing towards the direction he's facing, he falls asleep from boredom instead. Never used in-game. Strangely, the final frame is used for the instructions for Sonic 3 in Sonic Classic Collection.
"Whistle" animation Sonic whistling.
S3 - BWDeath.png
Black and white death sprite A black and white version of Sonic's death sprite. Such a sprite has been found in the files of Sonic the Hedgehog 2 and Sonic the Hedgehog CD as well.
Unused 2P Knuckles sprites Unused Gliding/Climbing animations exist for Knuckles in two-player mode, even though he does not have the ability to glide or climb while in two-player mode.
Leftover continue animation Leftover animation from the Continue screen in Sonic the Hedgehog 2.
Leftover Continue Icons Leftover Sonic and Tails continue icons from Sonic the Hedgehog 2, which are still mapped to the original palette.
Mini Death Egg Smaller rendition of the Death Egg. It seems to be part of a Death Egg hologram projector, which itself was unused in Sonic & Knuckles.
Diagonal Penguinator Sprites Diagonal frames of the Penguinator badnik from IceCap. These can be seen for a split second, if you place a Penguinator on the large hill at the beginning of the zone using debug mode.
Eggman run beta.gif
S3 - RobotnikCrouch.png
Unused Robotnik sprites Unused running frame where Robotnik has a different facial expression. There is also one for jumping.
"Surfboarding" animation An alternate animation for the intro. At one point, Sonic would have been surfboarding to Angel Island, rather than going Super Sonic. Interestingly, Sonic looks like his Sonic 2 incarnation. The surfing Sonic sprite can be placed in AIZ1 via Debug Mode. Also, the surfboard was reused as a Snowboard when IceCap needed a new intro, considering the lack of Flying Battery Zone.
Surfboard These sprites were used when Sonic jumped off the board in his surfboarding animation.
Robotnik flying away

An unused Robotnik object discovered via Debug Mode in Hydrocity Zone. It appears to be nothing more than Robotnik flying away towards the horizon. Its purpose is unknown, though it may have been intended for an early bad ending. This can be re-enabled using the PAR code: 05165A:04F2. These sprites would later be used in Sonic Origins for a new transition cutscene following Launch Base Zone.

Sonic 3 Flying Battery icon.PNG
FBZ Data Select icon An unused save file icon for Flying Battery Zone before it was re-ordered to be in Sonic & Knuckles, which is different than the corresponding icon in Sonic 3 & Knuckles. The background seen in this icon is also a more saturated blue than in the actual zone. You can view this icon in the PC and Genesis versions by hacking the save data to access level slot, or by using the PAR codes to view it in a completed game save slot while scrolling through the levels.
Teleporter Pad and Ice Boulder Unused Teleporter and Boulder sprites from Ice Cap Zone Act 1. However, the teleporter pad ended up being used in Sonic the Hedgehog 3 & Knuckles for Knuckles' transition into the stage.
S3 - Unused2PIcons.PNG
Leftover early sprites Leftover sprites from early versions of the game. It has a progress bar for Competition Mode. These sprites can be seen in the November 3rd, 1993 prototype.
S3 - SBall.gif
S-Ball An unused S gumball intended for the gumball machine Bonus Stage. It can also found in Sonic and Knuckles.
S3 - BlueGumball.png
Blue gumball A blue gumball can be located in the far back of the gumball machine, obscured by the other gumballs and the glare of the glass. The shade of blue seen here varies from the Bubble Shield gumball.
S3 - MetallicStructure.png
Metallic structure A sprite resembling a metallic structure that, based on its location at offset 18DB46, would have been used during the fight against Robotnik in Angel Island Zone Act 2.
Numbers 6-9 Unused lap counter digits.
Number Font An unused font, located directly after the font for the timer in the competition mode.
S3 - UnusedMedal.png
Unknown An unused object.
S3 - TornadoShadow.gif
Tornado's shadow A set of sprites resembling a shadow found within the graphics, used for the Tornado.
S3 - RobotnikUnused.png
Unused Marble Garden Zone Robotnik sprite During the boss fight at the end of Marble Garden Act 2, Robotnik will fly towards the horizon before beginning his next attack. This effect uses a sprite software scaling algorithm that allows this to be achieved. However, the effect begins to take place before Robotnik flies completely onscreen and as a result, the full unscaled sprite is never seen.
S3 - BossPiece.png
Launch Base Zone Act 2 object This sprite is used in the Launch Base Zone Act 2 laser boss battle, but it is obscured and cannot be seen.
S3 - Lightbulb.png
Carnival Night Zone light bulb This light bulb is used in Carnival Night Zone, but it has an unused function. If the water rises over it, it will explode and show its unused frame. This can never be seen because the light bulbs never make contact with the water in the actual game.

Sonic & Knuckles sprites

Artwork Description
Sonic3 Unused Sonic FBZ.gif
Sonic 3 alone Unused Tails FBZ.gif
Sonic and Tails climbing through the monkey bars of Flying Battery Zone.
Sonic 3 Unused Sonic holdon Vertical.gif
Sonic 3 alone Unused Tails horizontal hold.gif
Sonic and Tails during a cutscene after the Mushroom Hill Zone Act 2 Boss.
Sonic 3 FBZ Unused.png
Sonic 3 alone Unused Tails.png
Sonic and Tails grabbing the swinging poles in Mushroom Hill Zone.
Sonic 3 alone unused sonic sprite.png
Sonic 3 alone unused Tails sprite SOZ.png
Sonic and Tails scaling down the towers of Sandopolis Zone
Sonic3 unused Knuckles icon.png
Knuckles' life icon.
Sonic 3 unused Knuckles text.png
"Knuckles" text, which would have been used upon the end of an Act and Special Stage completion.
Sonic 3 Unused Knuckles Continue sprites.gif
Knuckles sprite for the Continue screen.
Sonic 3 unused data slect Knuckles.png
Knuckles sprite from the data select screen.
Sonic 3 Unused Robotnik Boss.gif
Used for the Flying Battery laser boss.
Sonic 3 FBZ unused Robotnik sprite.png
Although the first three would be used in the lock-on technology for the boss in Flying Battery Zone, the last one to the far right is completely unused.
Sonic the Hedgehog 3 Knuckles MGZ boss parts.png
Sonic 3 Unused Bomb.png
For this game, they appear in a mangled form on Knuckles' unused, broken post-Launch Base Zone Act 2 boss cutscene.
Sonic 3 unused bomb shoot.png
These appear in mangled form in Knuckles' unused, broken post-Launch Base Zone Act 2 boss cutscene. These would also be later seen in the Sonic & Knuckles prototype.
Sonic 3 FBZ Blaster Badnik.png
The Blaster.
Sonic 3 FBZ Technosqueek.png
The Technosqueek.
Sonic 3 Flying Battery Gapusle Boss Unused.png
The Gapsule miniboss from Flying Battery Zone Act 1.
Sonic 3 Flying Battery Laser Boss.gif
Sonic 3 Flying Battery Laser Boss Beam.gif
Sonic 3 Flying Battery Unused Boss Control Panel.png
The laser turret from Flying Battery Zone Act 2's miniboss.
Sonic 3 Flying Battery Unused Hang Mobile Boss.png
The Egg Hanger for Flying Battery Zone Act 2's boss.
Sonic 3 unused gold spheres.png
Palette and graphics data for the gold player-bouncing spheres.

Sonic & Knuckles music

Music from Sonic & Knuckles, which can still be played in the Sound Test.

Clip Sound ID Stage Notes
$09 Flying Battery Zone Act 1 The loop point in the "echo" track of the lead instrument is set slightly later than the rest of the tracks. As a result, it falls further and further out of sync every time the song loops. This was fixed later on.
$0A Flying Battery Zone Act 2
$0F Mushroom Hill Zone Act 1
$10 Mushroom Hill Zone Act 2
$11 Sandopolis Zone Act 1
$12 Sandopolis Zone Act 2
$13 Lava Reef Zone Act 1
$14 Lava Reef Zone Act 2/Hidden Palace
$15 Sky Sanctuary Zone
$16 Death Egg Zone Act 1
$17 Death Egg Zone Act 2 Death Egg Zone uses this for Acts 1 and 2 in Sonic the Hedgehog 3 alone.
$18 Hei-Hou miniboss This can be heard while fighting any Hydrocity Zone boss if the player jumps out of the water after the drowning music starts.
$1A The Doomsday Zone
$1B Glowing Spheres Bonus Stage
$1D Slot Machine Bonus Stage The unused Glowing Spheres Bonus Stage in Sonic the Hedgehog 3 alone uses this music.

Unused sounds

Unused entirely

Clip Sound ID Description
$3A A shield sound leftover from Sonic the Hedgehog 2.
$40 An electric zap. This sound would later be used for the Thunder Shield in Sonic Generations and Sonic Lost World.
$5A Sounds like something revving up. It would later be used in Sonic 3D Blast.
$6B Sounds like a higher-pitched version of the sound heard when hitting an R, Up or Down block in the Special Stage from the original Sonic the Hedgehog.
$6D Sounds like a door closing.
$71 Duplicate of $3A.
$7D Sounds like mild rattling.
$84 Sounds like something charging up. It only seems to be referenced in some Zone with a high level ID which is composed of garbage data.
$85 This would have been used in cooperation with $84.
$8D A very quiet sound.
$8E Another electric rev-up sound. This would later be used in Sonic Origins as a sound effect played when a Platform-raising Wheel is activated.
$99 A small "tick" sound.
$A1 A low-humming sound. This sound effect is used by the Stardust Speedway Zone Act 1 boss in Sonic Mania.
$A5 Sounds like something rising or powering up.
$A6 A dashing noise.
$B5 The sound effect of the breakable diamonds in the Special Stage from the original Sonic the Hedgehog.
$CF A louder version of the wind from Mushroom Hill Zone.
$D1 A very faint sound that may sound like static.
$D6 Some sort of rumbling/electric sound.
$D8 Sounds like a screeching warning siren. It was used in the November 3rd, 1993 prototype when Robotnik appeared behind the trees at the end of Angel Island Zone Act 2.
$DC-$DF Sounds of duplicates for $DB when running across water in Hydrocity Zone.

Sonic & Knuckles sounds

Clip Sound ID Description
$53 A laser charging sound, used for the Flying Battery Zone boss, the jumping spike balls in Lava Reef Zone Act 2, and the Warp Point.
$54 Laser firing sound, used for the Flying Battery Zone boss.
$55 Used in Sandopolis Zone when a brick goes across a line of black rotating circles.
$5C The sound of Mecha Sonic short-circuiting after it is defeated.
$69 The sound that plays when the player pushes a brick in Sandopolis Zone.
$7A The sound of the Lava Reef Act 2 boss emerging from lava.
$7C Used by the magnetized platforms in Flying Battery Zone.
$87 The sound that plays when the player bounces on a mushroom in Mushroom Hill Zone.
$88 Mushroom Hill Zone elevator sound.
$89 Mushroom Hill Zone's satellite dish (from Dr. Robotnik's season-changing machine).
$8A The sound Hyudoros from Sandopolis Zone make when they vanish, and the sound that plays when a Cloud is bounced.
$8B The sound of the Hei-Hou chopping a log.
$8C The sound of the Hei-Hou struggling to chop a log.
$8F The sound the door on the pyramid in Sandopolis Zone makes when it opens.
$90 Door closing sound from Sandopolis Zone. Also the sound of Knuckles hitting the ground after his defeat.
$92 Ghost sound effect from Sandopolis Zone.
$93 The sound that plays when the armor on Dr. Robotnik's golem machine comes back on.
$95 The sound of the giant hand appearing to attempt to crush the player in the Lava Reef Zone miniboss.
$96 The sound the giant spike balls in Lava Reef Zone make when they roll around.
$97 The sound a Toxomister makes when it sprays its toxic gases.
$98 The sound of a falling stalactite in Lava Reef Zone.
$9A The sound of the pop-up springs from Sky Sanctuary Zone.
$9B A loud bang that plays when the Sandopolis Zone Act 2 boss comes closer to the player.
$9C Sound that plays when a Super Emerald regains its color.
$9D The sound of the missile reticles in the Lava Reef Zone Act 2 boss.
$9E The sound of a platform breaking upon coming into contact with the Lava Reef Zone Act 2 boss.
$A0 The sound of the Lava Reef Zone Act 2 boss firing a missile.
$A2 The sound of the speed-up launchers in Flying Battery Zone and Death Egg Zone.
$A3 Death Egg Zone lift platform sound effect.
$A4 The sound that Mecha Sonic makes when it goes super.
$AE The sound that the seesaw mushroom from Mushroom Hill Zone makes when the black weight lands on it. This sound is also used in the Bonus Stages in Sonic & Knuckles.
$C2 The sound of the flamethrowers in Flying Battery Zone and Lava Reef Zone.
$C4 The sound Red Eye makes when it gets angry.
$CA The sound of the light beam transportation systems in Death Egg Zone.
$CE The gusts of wind from Mushroom Hill Zone. Also used in Knuckles' ending after Super Mecha Sonic explodes.
$D3 Used when the Death Egg flies through Sky Sanctuary Zone.
$D4 Used by the bouncing puzzle room in Death Egg Zone.
$D5 Used when the lava falls from Lava Reef Zone.
$D7 The sound of the elevators in Lava Reef Zone and Death Egg Zone.
$D9 The sound the electromagnets in Flying Battery Zone and the black gravity spheres in Death Egg Zone make.
$DA The sound of the wind trap Knuckles activates in Mushroom Hill Zone.

Unused scroll credits

An unused, unfinished, scrolling credits routine can be found in the game's files and can be activated by setting RAM address "FA87" to "2" during the credits sequence. The actual credits were apparently not yet in place when this was abandoned, as it scrolls small and large versions of the letters B-F, and then abruptly fades to the Sonic the Hedgehog 3 logo screen. In the final game, the staff credits roll simply fades between static pages of text.

Sonic & Knuckles Zones


Sonic 3 - Accessing Sonic & Knuckles' Zones

A few remnants of all the Sonic & Knuckles zones are still left in the game. As mentioned earlier, Flying Battery would have been played between Carnival Night Zone and IceCap Zone, but when the game was split into two that Zone was moved into Sonic & Knuckles to give it more levels. Most of the data that once belonged to these levels either is not present in the game anymore or is not currently accessible. Still, there are some leftovers in Sonic the Hedgehog 3 – a data select icon, its music, and even its bosses.

Even though the player can use codes or use Sonic 3C's savestates to access the unused zones, those will crash the game. All unused Zones outside of Flying Battery will say "Zone." Most (such as Sandopolis Zone and Death Egg Zone) will crash on the title card, while some (like Lava Reef Zone) will load the level and end up in a glitchy mess and crash. In the case of Flying Battery, while one can access it by way of PAR codes, it will be corrupted with IceCap Zone tiles appearing all over the place. However, the player will need to do this in a specific way because alone, these codes will crash the game when trying to access that level data. Using Sonic 3C's savestates to access the Lava Reef Boss Area or Hidden Palace Zone will have glitchy collision data, and Angel Island's sprites appear all over the place. Oddly enough, the Special Stage music plays here.

November 3rd, 1993 Prototype

In this pre-release prototype version of Sonic the Hedgehog 3, a lot of progress had already been made, but a huge amount of content was initially changed before the final release. The SEGA intro is reused from Sonic the Hedgehog 2 (though somewhat glitched in appearance), the title logo is altered, and Sonic and Tails use their Sonic the Hedgehog 2 sprites. The Sound Test Menu is identical to the one used in the final version of Sonic the Hedgehog 3 alone.


Most, if not all Zones contain an altered layout, mainly for Sonic and Tails' route.

Angel Island Zone

A huge waterfall with lots of falling logs are a recurring gimmick for both Acts. This was eventually removed and simplified in the final release.

Act 1

Sonic starts on a surfboard, surfing onto the island. Upon running further, he encounters Knuckles, standing and blocking the hedgehog. After taunting Sonic, Knuckles quickly runs away to the right, allowing the player control over Sonic. The final intro still exists in this beta but the game soft locks when Knuckles punches the player. The mini-boss during the burning of the island takes longer to leave.

Act 2

Hydrocity Zone

Act 1

Has a much different background, containing leaves coming out from the walls (similar to Marble Garden, which is the next Zone after this one).

Act 2

Marble Garden

Act 1

The slope Sonic starts off will have a different layout near the end. The Spinning Tops hover in midair when jumped off of.

Act 2

Carnival Night Zone

The white spinning cylinder of lights create a different sound effect.

Act 1

Knuckles' area before the boss contains two rising platforms instead of one, as well as two spike pits below them. The Bowling Spin's background area is not moving, but still hovers over a bottomless pit. The area is not fully connected to the walls, so the player will fall through the sides if not careful. The boss itself has a slightly different behavior than in the final version. When hit by Sonic, the core opens for a set amount of time and no longer closes after being hit with its spinning top (allowing for consecutive hits).

Act 2

A few Barrels are either alternately placed or not present. The water remains at its low point throughout the entire Act, meaning Knuckles does not appear to raise the water and darken the Act. Also, the Switch to relight the Act is not present. Knuckles also does not appear to affect the tunnels near the end, and of course, his teleporter is inactive.

Flying Battery Zone

This Zone is quite intact, albeit heavily unfinished. The background is slightly altered when compared to the final release (the prototype background more closely represents the unused icon found in later builds). There are no objects to be found at all, save for the end of the Acts and Debug Mode which, aside from the usual objects found in other Zones/Stages, only contains Blasters and the three Technosqueeks (the wall moving one looks a bit glitched when placed).

Act 1

One of the backgrounds contains a few containers with the words "EGG" on the side. Gapsule is fully loaded and defeatable.

Act 2

There is no laser boss fight, so Sonic may end up running straight into the Egg Hanger (who is already loaded upon entering the area and fully defeatable as well). The rising floor section does not appear to be implemented yet, though the closing wall for it is still present. The end Capsule is present as well, but the exit door afterwards appears to be blocked and unavailable.

IceCap Zone

Act 1

There is no snowboard yet, but the area for it appears functional (meaning Rings are placed and the avalanche at the end will still appear). Knuckles' areas differ. The first one does not have any objects loaded at all (save for the blocking column of ice at the entrance). The second one interestingly has a stack of four ice blocks instead of a one-way column of ice seen in the final builds.

Act 2

It is possible to break out of the ice without assistance. On one of the lower bridges in the underground path beneath said bridge lies two ice blocks with two upside-down Snowblowers firing upward through the Bridge. The Egg Froster seems to fire a bit slower than in the final.

Launch Base Zone

Act 1

The elevators are a bit wide, meaning to activate them Sonic will need to position himself in the center. The boss room for Sonic and Tails' route contains two unique transport tunnels that when entered, will transport them directly above one of the yellow boxes that contain the mini-boss (left tunnel for left box, and right tunnel for right). Why this was removed remains unclear. The scripts for the mini-boss to appear do not seem to function normally, making the mini-boss somewhat impossible to encounter. If Robotnik was 'destroyed' (by using Tails) in the room where Knuckles destroys the building, the Mini-Boss box may appear outside the building and trigger the activation of said mini-boss. Overall behaves the same as in the final, albeit slower vertical speed and does not rise when hit. Defeating the mini-boss clears the stage but warps the player halfway across Act 2, likely due to glitched stage transitioning.

Act 2

A slope-tunnel is present at the bottom of the starting area. Horizontally retractable spikes are placed before the first drop containing three flamethrowers, making this section much harder than in the final. There are no spikes present in the following tunnel containing the switch for the next drop. Egg Cannon requires only one hit to defeat, and past this, Knuckles stand on a circular, vertical bridge, instead of a vertical beam in the final. Sonic appears stuck when riding the Egg Mobile.

Other Stages

Mushroom Valley and Sandopolis are inaccessible, but the data for their respective mid-boss fights remain. Some data for the rest of the inaccessable Zones still exists within this build.

While Lava Reef Zone is normally inaccessable and very glitchy, restoring the color palettes and graphics can make it become somewhat playable. Interestingly, the crashed Death Egg in the background is upside-down, instead of face-downward seen in the final.

The multiplayer Stages are all playable. Interestingly, some of the item icons are different (such as Speed Up/Down).

The three Bonus Stages are only partially completed. They are all accessible, but none of them function properly yet.

The Special Stages do not exist yet, though the music for it does. Accessing either of them will load up some test screen with the manipulative red spheres from the Debug Menu of Angel Island Zone (they can still be controlled within these screens).


It appears the stages were already planned out from the start of development, as the Sound Test reveals that all stages seen within the final version have their tracks already created within the prototype (including a few extra tracks, such as the credits and multiplayer menu). Some tracks, however, have received minor to major development changes over time as development continued.

Alternate soundtracks

Before Michael Jackson and Brad Buxer came in to record the music for Carnival Night Zone, IceCap Zone and Launch Base Zone, these Zones originally had different music, as heard upon entering said respective Zone(s) or played from within the Sound Test. Those music tracks were eventually used in MIDI form in the Sonic & Knuckles Collection for PC (as well as the Knuckles encounter theme also heard within the prototype). The mini-boss music heard from Sonic the Hedgehog 3 & Knuckles is used in this prototype.

Name Artist(s) Length Music track
Carnival Night Zone (Act 1) Sega 1:04
Carnival Night Zone (Act 2) Sega 0:55
IceCap Zone (Act 1) Sega 1:06
IceCap Zone (Act 2) Sega 1:15
Launch Base Zone (Act 1) Sega 1:16
Launch Base Zone (Act 2) Sega 1:12
Competition menu Sega 0:54

Other Zone music were slightly altered in sound or quality. Besides the Zones, some other soundtracks are completely different when compared to the final release and/or Sonic & Knuckles:

Name Artist(s) Length Music track Description
Angel Island Zone (Act 2) Sega 2:25
Flying Battery Zone (Act 1) Sega 1:30 The audio glitch from the next Sonic the Hedgehog 3 build is still present here.
Flying Battery Zone (Act 2) Sega 1:32
Mushroom Valley Zone (Act 1) Sega 1:32 The "jumping on a mushroom" sound effect is more noticeable in this version.
Mushroom Valley Zone (Act 2) Sega 1:26 Has a stronger "wood" sound effect in the song.
Sky Sanctuary Zone Sega 2:15
Credits Sega 3:25 Has a few sound tones from the Sega Genesis variant of Diamond Dust Zone.
Unused Theme Sega 1:58 Listed as Number 2E in Sound Test menu.

External links

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