Difference between revisions of "Sonic the Hedgehog (16-bit) (prototype)/Hidden content"
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− | {{back}} | + | {{back}}{{IncompleteList}} |
+ | '''TODO:''' | ||
+ | *Unused level chunks | ||
+ | *Unused debug/edit mode features from earlier builds | ||
+ | *Unused/early GHZ layout data | ||
+ | *Perhaps stuff that would go unused in the final too, for completion's sake | ||
+ | |||
==Level select== | ==Level select== | ||
{{HiddenContent | {{HiddenContent | ||
Line 14: | Line 20: | ||
==Unused content== | ==Unused content== | ||
===Art=== | ===Art=== | ||
− | {{UnusedTable|type=Art| | + | {{UnusedTable|type=Art|offsets=yes| |
+ | {{UnusedRow | ||
+ | | content={{SpriteImage|Sonic1Proto MD Sprite UnusedFont.png}} | ||
+ | | offset=$18000 | ||
+ | | desc=An 8x8 font that comes in three different shades of grey. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content={{SpriteImage|Sonic1Proto MD Sprite Smoke.png|2}} | ||
+ | | offset=$2656E | ||
+ | | desc=Smoke effects{{ref|{{LinkRetro|post=974737|title=Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #974737 by Rika Chou}}}}. Their VRAM spot would be overwritten by the [[Checkpoint|Lamppost]] in the final.{{ref|{{LinkRetro|post=974802|title=Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #974802 by vladikcomper}}}} | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content={{SpriteImage|Sonic1Proto MD Sprite WaterSplash.png}} | ||
+ | | offset=$26672 | ||
+ | | desc=Water splash effects for [[Labyrinth Zone]] that go unused due to a lack of water. In this prototype, the splash has simpler shading and uses Sonic's palette. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content={{SpriteImage|Sonic1Proto MD Sprite Sparkle.png|2}} | ||
+ | | offset=$267D4 | ||
+ | | desc=Sparkle effects. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content={{SpriteImage|Sonic1Proto MD Sprite UnusedFlame.png|2}} | ||
+ | | offset=$26BF6 | ||
+ | | desc=Small flame effects{{ref|{{LinkRetro|post=974737|title=Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #974737 by Rika Chou}}}}. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content={{SpriteImage|Sonic1Proto MD Sprite EnemyPoints.png|2}} | ||
+ | | offset=$2E6C8 | ||
+ | | desc=Combo bonuses awarded from enemies and breakable objects{{ref|{{LinkRetro|post=976355|title=Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #976355 by Nemesis}}}}. All numbers are loaded in VRAM in preparation for combos, but defeating enemies consecutively only awards 100 points in this build. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content={{SpriteImage|Sonic1Proto MD Sprite BossPieces.png}}<br>{{SpriteImage|Sonic1Proto MD Sprite BossSpring.png}} | ||
+ | | offset=$60864 | ||
+ | | desc=An assortment of parts for the [[Egg Mobile]]. While most of the parts here eventually see use for the bosses in the final game, there is a spring attachment that never saw use{{ref|{{LinkRetro|post=974737|title=Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #974737 by Rika Chou}}}}. The second image is an attempt at assembling the spring attachment. | ||
+ | }} | ||
{{UnusedRow | {{UnusedRow | ||
− | | | + | | content={{SpriteImage|Sonic1Proto MD Sprite SpecialStage SkullBlock.png}} |
− | | desc= | + | | offset=$6512E |
+ | | desc=Skull block for the [[Special Stage (Sonic the Hedgehog 16-bit)|Special Stage]]{{ref|{{LinkRetro|post=974732|title=Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #974732 by Rika Chou}}}}. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content={{SpriteImage|Sonic1Proto MD Sprite SpecialStage UBlock.png}} | ||
+ | | offset=$651FE | ||
+ | | desc="U"/magnet block for the [[Special Stage (Sonic the Hedgehog 16-bit)|Special Stage]]{{ref|{{LinkRetro|post=974730|title=Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #974730 by Rika Chou}}}}. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content={{SpriteImage|Sonic1 MD Sprite Emeralds.png|2|crop_x=32|crop_width=16}} | ||
+ | | offset=$65B76 | ||
+ | | desc=A [[Chaos Emerald]] for the [[Special Stage (Sonic the Hedgehog 16-bit)|Special Stage]]{{ref|{{LinkRetro|post=976356|title=Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #976356 by Nemesis}}}}. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content={{SpriteImage|Sonic1Proto MD Sprite UnusedUFOFrame.png}} | ||
+ | | offset=$6C8A0 | ||
+ | | desc=An unused animation frame for the UFOs in [[Marble Zone]]. Use [[sega:Action Replay (Mega Drive)|PAR]] code {{hex|011430:0006}} to restore it in the animation script{{ref|https://tcrf.net/Proto:Sonic_the_Hedgehog_(Genesis)#Unused_Sprites}}. | ||
}} | }} | ||
}} | }} | ||
Line 23: | Line 80: | ||
===Objects=== | ===Objects=== | ||
====Placeable in [[edit mode]]==== | ====Placeable in [[edit mode]]==== | ||
− | {{UnusedTable|type=Art| | + | {{UnusedTable|type=Art|ids=yes| |
{{UnusedRow | {{UnusedRow | ||
− | | | + | | content={{spriteImage|Sonic1 MD Sprite Monitors.png|crop_width=30}} |
+ | | id= | ||
| desc=Static [[monitor]] that does nothing when broken. | | desc=Static [[monitor]] that does nothing when broken. | ||
}} | }} | ||
{{UnusedRow | {{UnusedRow | ||
− | | | + | | content={{SpriteImage|Sonic1Proto MD Sprite Splats.png}} |
+ | | id=4F | ||
| desc=The infamous [[Splats]] enemy, placeable in [[Marble Zone]]. This [[Badnik]] is fully coded in this build, and when placed it continually bounces forward, only changing direction when it hits a wall. While it uses Sonic's palette line in the object list, it uses the second palette line when placed. | | desc=The infamous [[Splats]] enemy, placeable in [[Marble Zone]]. This [[Badnik]] is fully coded in this build, and when placed it continually bounces forward, only changing direction when it hits a wall. While it uses Sonic's palette line in the object list, it uses the second palette line when placed. | ||
}} | }} | ||
{{UnusedRow | {{UnusedRow | ||
− | | | + | | content={{SpriteImage|Sonic1Proto MD Sprite PurpleRoller.png}} |
+ | | id= | ||
| desc=[[Roller (Sonic the Hedgehog 16-bit)|Roller]] enemies for [[Spring Yard Zone]]. They are fully functional, and use the second palette line, making them look purple and yellow. | | desc=[[Roller (Sonic the Hedgehog 16-bit)|Roller]] enemies for [[Spring Yard Zone]]. They are fully functional, and use the second palette line, making them look purple and yellow. | ||
}} | }} | ||
{{UnusedRow | {{UnusedRow | ||
− | | | + | | content={{SpriteImage|Sonic1Proto MD Sprite SLZSeesaw.png}} |
+ | | id=5E | ||
| desc=Seesaws for [[Star Light Zone]]. While fully functional, they don't have the spike ball that helps propel Sonic into the air. | | desc=Seesaws for [[Star Light Zone]]. While fully functional, they don't have the spike ball that helps propel Sonic into the air. | ||
}} | }} | ||
Line 43: | Line 104: | ||
====Others==== | ====Others==== | ||
− | {{UnusedTable|type=Art| | + | {{UnusedTable|type=Art|ids=yes| |
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=02-03 | ||
+ | | desc=Two graphicless objects that date back to the [[:File:GD Sonic 1 Yuji Naka.png|earliest stages of the game's development in February 1990]].{{ref|{{LinkYoutube|video=CRphv7x97uw|title=Sonic initial development site.Sega R&D news footage of Feb 1990.}}}} Object ID {{hex|02}} is a "pulsating" object, and {{hex|03}} is a tall rectangular object. Both objects cannot be placed anywhere in a level as they have set coordinates, and cannot be interacted with by the player. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=04 | ||
+ | | desc=An animated object similar to ID {{hex|03}}, which can be placed anywhere on the X axis but has a fixed Y axis. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=05 | ||
+ | | desc=An invisible object. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=06 | ||
+ | | desc=An object that follows the HUD. | ||
+ | }} | ||
{{UnusedRow | {{UnusedRow | ||
− | | | + | | content= |
− | | desc= | + | | id=1B |
+ | | desc=A static, collisionless object with two variations, but no corresponding graphics. In the final game, this object was replaced with the water surface object for [[Labyrinth Zone]]. | ||
}} | }} | ||
{{UnusedRow | {{UnusedRow | ||
− | | | + | | content= |
− | | desc= | + | | id=1D |
+ | | desc=An unused switch that acts like any other switch that opens a closed passage. It remains unused in the final game. | ||
}} | }} | ||
{{UnusedRow | {{UnusedRow | ||
− | | | + | | content={{SpriteImage|Sonic1Proto MD Sprite EarlyBallHog.png}} |
+ | | id=1E | ||
+ | | desc=[[Ball Hog (Sonic the Hedgehog 16-bit)|Ball Hog]], based on its original front-facing design seen in prerelease material, going unreferenced in the object table. They move from side to side, periodically stopping to drop bombs directly downward. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content={{SpriteImage|Sonic1Proto MD Sprite BallHogBomb.png}} | ||
+ | | id=20 | ||
+ | | desc=The bombs dropped by the Ball Hog. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=2A | ||
+ | | desc=A door object, operated by pressing a switch. It also has a variant that is set up to use other tiles, has no collision, and doesn't react to switches. In the final game, this object was replaced with the one-way doors for [[Scrap Brain Zone]]. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content={{SpriteImage|Jaws-spr.png}} | ||
+ | | id=2C | ||
| desc=[[Jaws (Sonic the Hedgehog 16-bit)|Jaws]] enemies for [[Labyrinth Zone]], which exist in the object table but go unreferenced. They are fully functional. | | desc=[[Jaws (Sonic the Hedgehog 16-bit)|Jaws]] enemies for [[Labyrinth Zone]], which exist in the object table but go unreferenced. They are fully functional. | ||
}} | }} | ||
{{UnusedRow | {{UnusedRow | ||
− | | | + | | content={{SpriteImage|Burrobot-spr.png}} |
− | | desc=[[ | + | | id=2D |
+ | | desc=[[Burrobot (Sonic the Hedgehog 16-bit)|Burrobot]] enemies for [[Labyrinth Zone]], which exist in the object table but go unreferenced. They use the second palette line and do not start buried underground, but are otherwise functional. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content={{SpriteImage|Sonic1 MD Sprite GiantRing.gif}} | ||
+ | | id=4B | ||
+ | | desc=The [[Giant Ring]] that would transport Sonic to the Special Stage. Its coding is different in that once Sonic touches it, instead of disappearing instantly, he sparkles for a couple of seconds and then "warps" away. The coding is incomplete beyond this point, so Sonic reappears a couple of seconds later. This "warping" code remains [[Sonic the Hedgehog (16-bit)/Hidden content#Warping effect|unused in the final game]]. The warping effect has an object ID of {{hex|4A}}. | ||
+ | }} | ||
+ | }} | ||
+ | |||
+ | ===Audio=== | ||
+ | ====Music==== | ||
+ | {{UnusedTable|type=Audio|ids=yes| | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=8B | ||
+ | | desc=Ending theme. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=8D | ||
+ | | desc=[[Final Zone]]. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=90 | ||
+ | | desc=Continue screen. Goes unused in this build as [[Continue]]s are not implemented yet. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=91 | ||
+ | | desc=Staff roll medley. | ||
+ | }} | ||
+ | }} | ||
+ | |||
+ | ====Sound effects==== | ||
+ | Many of the sound effects listed here are unique to this prototype and would be replaced by other sounds in the final. | ||
+ | {{UnusedTable|type=Audio|ids=yes| | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=A1 | ||
+ | | desc=Similar to the sound played when exiting a Special Stage. Replaced by the checkpoint sound in the final. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=A5 | ||
+ | | desc=Used by the unused Ball Hog's bombs when they explode. Remains unused in the final. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=A8 | ||
+ | | desc=This sound effect is used by the unused warping effect in this build. Replaced by the aforementioned Special Stage exit sound in the final. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=A9 | ||
+ | | desc=A longer, higher-pitched rolling sound. Replaced by the sound for the speed/Reverse blocks in the Special Stage in the final. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=AA | ||
+ | | desc=The splashing sound for entering water; unused as there is no water yet. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=AD | ||
+ | | desc=A duplicate of the Badnik/monitor explosion sound. Replaced by the sound for breathing in an [[Air bubbles|air bubble]]. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=B0 | ||
+ | | desc=A low-pitched siren sound that loops endlessly. Replaced by the buzzsaw sound effect. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=B1 | ||
+ | | desc=A higher-pitched ''Pac-Man''-esque siren that also loops. Replaced by the sound for Scrap Brain Zone's electrical hazards. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=B2 | ||
+ | | desc=Some sort of buzzer sound. Replaced by the sound played when Sonic drowns. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=B3 | ||
+ | | desc=A rough sound effect that quickly rises and falls in pitch. Replaced by the sound for Scrap Brain Zone's flamethrowers. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=B8 | ||
+ | | desc=Similar to the spike sound. Remains unused in the final. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=BA | ||
+ | | desc=Sounds similar to the sound used by the drop targets in ''[[Sonic the Hedgehog 2 (16-bit)|Sonic 2]]''<nowiki>'</nowiki>s [[Casino Night Zone]]. Replaced by the sound for hitting the diamonds in the Special Stage. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=BB | ||
+ | | desc=The sound used for the Labyrinth Zone doors and Scrap Brain Zone trapfloors; unused as those objects don't exist yet. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=BC | ||
+ | | desc=The sound used for the transport tubes in Scrap Brain Zone; unused as they don't function yet. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=BF | ||
+ | | desc=Two quick, harsh-sounding notes that loop indefinitely. Replaced by the [[Continue]] sound. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=C2 | ||
+ | | desc=An alternate version of the Badnik/monitor destroying sound. Replaced by the underwater warning bell. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=C3 | ||
+ | | desc=A deeper version of the bomb explosion sound heard in the next sound ID slot. Replaced by the sound for entering a Giant Ring. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=C9 | ||
+ | | desc=A harsh, vibrating sound effect. Replaced by the sound for finding a hidden point bonus at the end of an Act. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=CA | ||
+ | | desc=Sounds like footsteps walking away. Replaced by the sound played when warping to the Special Stage. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=D1 | ||
+ | | desc=A louder version of the [[Green Hill Zone (Sonic the Hedgehog 16-bit)|Green Hill Zone]] waterfall sounds. Cannot be played in the sound test, and completely removed in the final. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=D2 | ||
+ | | desc=A strange rhythmic pounding sound that loops endlessly. Cannot be played in the sound test, and completely removed in the final. | ||
+ | }} | ||
+ | {{UnusedRow | ||
+ | | content= | ||
+ | | id=D3 | ||
+ | | desc=A fiery noise that progressively oscillates, looping endlessly. Cannot be played in the sound test, and completely removed in the final. | ||
+ | }} | ||
+ | }} | ||
+ | |||
+ | ===[[Green Hill Zone (Sonic the Hedgehog 16-bit)|Green Hill Zone]] alternate palette=== | ||
+ | {{HiddenContent | ||
+ | | image1=Sonic1Proto MD GHZ NightPalette.png | ||
+ | | desc={{MDPalette | ||
+ | |0400|0000|0400|0600|0822|0C44|0CCC|0666|0444|0000|0C64|0026|000C|0004|0000|00CC | ||
+ | |0400|0000|0204|0406|0608|082C|0CCC|0666|0444|0000|06C0|0260|00CC|0044|0000|0000 | ||
+ | |0000|0000|0AAA|0002|0004|0028|004A|008A|0800|0A42|0A86|0AA8|0000|0020|0060|00A4 | ||
+ | |0400|0000|0800|0C42|0C86|0CC8|0CCC|0C48|0604|0200|0006|042C|086C|0000|0000|0000 | ||
+ | }} | ||
+ | There is an alternate palette intended for Green Hill Zone that exists in the ROM, but is not normally used. By changing ROM address {{hex|0x1AF6}} to {{hex|1D 9C}} and {{hex|0x1AFE}} to {{hex|1D BC}}, or by using [[sega:Game Genie (Mega Drive)|Game Genie]] codes {{hex|XTPA-B4H0}} and {{hex|1TPA-B4H8}}, this palette can be accessed. This palette is almost identical to the one used for the high score screen in the [[Sonic the Hedgehog (arcade game)|Mega Play version]]{{ref|{{LinkRetro|post=980382|title=Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #980382 by MrLordSith}}}}. | ||
}} | }} | ||
+ | |||
+ | ===[[Spring Yard Zone|Sparkling Zone]] early object layout=== | ||
+ | {{HiddenContent | ||
+ | | image1=Sonic1Proto MD SZ EarlyLayout Badniks.png | ||
+ | | image2=Sonic1Proto MD SZ EarlyLayout RedButton.png | ||
+ | | desc=An unreferenced object position list that seems to have been for an earlier layout of Sparkling Zone Act 1 can be found at ROM address {{hex|0x729CA}}. To access it, change ROM address {{hex|0x70040}} to {{hex|29 CA}}.{{ref|https://tcrf.net/Proto:Sonic_the_Hedgehog_(Genesis)#Unused_Object_Positions}} | ||
+ | |||
+ | When loaded in-game, this layout has numerous differences, such as a large abundance of Badniks including [[Moto Bug (Sonic the Hedgehog 16-bit)|Moto Bugs]], and a button that flashes red (which would go unused in the final game). Interestingly, some of the object positions seem to match up with [[Sonic the Hedgehog (16-bit)/Development#Sparkling Zone|prerelease screenshots from earlier builds]]. | ||
}} | }} | ||
Latest revision as of 14:55, 4 December 2022
- Back to: Sonic the Hedgehog (16-bit) (prototype).
|
This list is incomplete. The following list has been marked as incomplete. If you can, please complete it. |
---|
TODO:
- Unused level chunks
- Unused debug/edit mode features from earlier builds
- Unused/early GHZ layout data
- Perhaps stuff that would go unused in the final too, for completion's sake
Contents
Level select
Enabled by default. Simply press + on the title screen.
Edit mode
Enabled by default. Highlight a Zone in the level select and press and hold .
Unused content
Art
Art | Offset | Description |
---|---|---|
$18000 | An 8x8 font that comes in three different shades of grey. | |
$2656E | Smoke effects[1]. Their VRAM spot would be overwritten by the Lamppost in the final.[2] | |
$26672 | Water splash effects for Labyrinth Zone that go unused due to a lack of water. In this prototype, the splash has simpler shading and uses Sonic's palette. | |
$267D4 | Sparkle effects. | |
$26BF6 | Small flame effects[1]. | |
$2E6C8 | Combo bonuses awarded from enemies and breakable objects[3]. All numbers are loaded in VRAM in preparation for combos, but defeating enemies consecutively only awards 100 points in this build. | |
$60864 | An assortment of parts for the Egg Mobile. While most of the parts here eventually see use for the bosses in the final game, there is a spring attachment that never saw use[1]. The second image is an attempt at assembling the spring attachment. | |
$6512E | Skull block for the Special Stage[4]. | |
$651FE | "U"/magnet block for the Special Stage[5]. | |
$65B76 | A Chaos Emerald for the Special Stage[6]. | |
$6C8A0 | An unused animation frame for the UFOs in Marble Zone. Use PAR code 011430:0006 to restore it in the animation script[7]. |
Objects
Placeable in edit mode
Art | ID | Description |
---|---|---|
Static monitor that does nothing when broken. | ||
4F | The infamous Splats enemy, placeable in Marble Zone. This Badnik is fully coded in this build, and when placed it continually bounces forward, only changing direction when it hits a wall. While it uses Sonic's palette line in the object list, it uses the second palette line when placed. | |
Roller enemies for Spring Yard Zone. They are fully functional, and use the second palette line, making them look purple and yellow. | ||
5E | Seesaws for Star Light Zone. While fully functional, they don't have the spike ball that helps propel Sonic into the air. |
Others
Art | ID | Description |
---|---|---|
02-03 | Two graphicless objects that date back to the earliest stages of the game's development in February 1990.[8] Object ID 02 is a "pulsating" object, and 03 is a tall rectangular object. Both objects cannot be placed anywhere in a level as they have set coordinates, and cannot be interacted with by the player. | |
04 | An animated object similar to ID 03, which can be placed anywhere on the X axis but has a fixed Y axis. | |
05 | An invisible object. | |
06 | An object that follows the HUD. | |
1B | A static, collisionless object with two variations, but no corresponding graphics. In the final game, this object was replaced with the water surface object for Labyrinth Zone. | |
1D | An unused switch that acts like any other switch that opens a closed passage. It remains unused in the final game. | |
1E | Ball Hog, based on its original front-facing design seen in prerelease material, going unreferenced in the object table. They move from side to side, periodically stopping to drop bombs directly downward. | |
20 | The bombs dropped by the Ball Hog. | |
2A | A door object, operated by pressing a switch. It also has a variant that is set up to use other tiles, has no collision, and doesn't react to switches. In the final game, this object was replaced with the one-way doors for Scrap Brain Zone. | |
2C | Jaws enemies for Labyrinth Zone, which exist in the object table but go unreferenced. They are fully functional. | |
2D | Burrobot enemies for Labyrinth Zone, which exist in the object table but go unreferenced. They use the second palette line and do not start buried underground, but are otherwise functional. | |
4B | The Giant Ring that would transport Sonic to the Special Stage. Its coding is different in that once Sonic touches it, instead of disappearing instantly, he sparkles for a couple of seconds and then "warps" away. The coding is incomplete beyond this point, so Sonic reappears a couple of seconds later. This "warping" code remains unused in the final game. The warping effect has an object ID of 4A. |
Audio
Music
Audio | ID | Description |
---|---|---|
8B | Ending theme. | |
8D | Final Zone. | |
90 | Continue screen. Goes unused in this build as Continues are not implemented yet. | |
91 | Staff roll medley. |
Sound effects
Many of the sound effects listed here are unique to this prototype and would be replaced by other sounds in the final.
Audio | ID | Description |
---|---|---|
A1 | Similar to the sound played when exiting a Special Stage. Replaced by the checkpoint sound in the final. | |
A5 | Used by the unused Ball Hog's bombs when they explode. Remains unused in the final. | |
A8 | This sound effect is used by the unused warping effect in this build. Replaced by the aforementioned Special Stage exit sound in the final. | |
A9 | A longer, higher-pitched rolling sound. Replaced by the sound for the speed/Reverse blocks in the Special Stage in the final. | |
AA | The splashing sound for entering water; unused as there is no water yet. | |
AD | A duplicate of the Badnik/monitor explosion sound. Replaced by the sound for breathing in an air bubble. | |
B0 | A low-pitched siren sound that loops endlessly. Replaced by the buzzsaw sound effect. | |
B1 | A higher-pitched Pac-Man-esque siren that also loops. Replaced by the sound for Scrap Brain Zone's electrical hazards. | |
B2 | Some sort of buzzer sound. Replaced by the sound played when Sonic drowns. | |
B3 | A rough sound effect that quickly rises and falls in pitch. Replaced by the sound for Scrap Brain Zone's flamethrowers. | |
B8 | Similar to the spike sound. Remains unused in the final. | |
BA | Sounds similar to the sound used by the drop targets in Sonic 2's Casino Night Zone. Replaced by the sound for hitting the diamonds in the Special Stage. | |
BB | The sound used for the Labyrinth Zone doors and Scrap Brain Zone trapfloors; unused as those objects don't exist yet. | |
BC | The sound used for the transport tubes in Scrap Brain Zone; unused as they don't function yet. | |
BF | Two quick, harsh-sounding notes that loop indefinitely. Replaced by the Continue sound. | |
C2 | An alternate version of the Badnik/monitor destroying sound. Replaced by the underwater warning bell. | |
C3 | A deeper version of the bomb explosion sound heard in the next sound ID slot. Replaced by the sound for entering a Giant Ring. | |
C9 | A harsh, vibrating sound effect. Replaced by the sound for finding a hidden point bonus at the end of an Act. | |
CA | Sounds like footsteps walking away. Replaced by the sound played when warping to the Special Stage. | |
D1 | A louder version of the Green Hill Zone waterfall sounds. Cannot be played in the sound test, and completely removed in the final. | |
D2 | A strange rhythmic pounding sound that loops endlessly. Cannot be played in the sound test, and completely removed in the final. | |
D3 | A fiery noise that progressively oscillates, looping endlessly. Cannot be played in the sound test, and completely removed in the final. |
Green Hill Zone alternate palette
There is an alternate palette intended for Green Hill Zone that exists in the ROM, but is not normally used. By changing ROM address 0x1AF6 to 1D 9C and 0x1AFE to 1D BC, or by using Game Genie codes XTPA-B4H0 and 1TPA-B4H8, this palette can be accessed. This palette is almost identical to the one used for the high score screen in the Mega Play version[9].
Sparkling Zone early object layout
An unreferenced object position list that seems to have been for an earlier layout of Sparkling Zone Act 1 can be found at ROM address 0x729CA. To access it, change ROM address 0x70040 to 29 CA.[10]
When loaded in-game, this layout has numerous differences, such as a large abundance of Badniks including Moto Bugs, and a button that flashes red (which would go unused in the final game). Interestingly, some of the object positions seem to match up with prerelease screenshots from earlier builds.
References
- ↑ 1.0 1.1 1.2 [Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #974737 by Rika Chou Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #974737 by Rika Chou]
- ↑ [Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #974802 by vladikcomper Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #974802 by vladikcomper]
- ↑ [Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #976355 by Nemesis Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #976355 by Nemesis]
- ↑ [Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #974732 by Rika Chou Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #974732 by Rika Chou]
- ↑ [Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #974730 by Rika Chou Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #974730 by Rika Chou]
- ↑ [Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #976356 by Nemesis Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #976356 by Nemesis]
- ↑ The Cutting Room Floor: Proto:Sonic the Hedgehog (Genesis)#Unused Sprites
- ↑ [Sonic initial development site.Sega R&D news footage of Feb 1990. Sonic initial development site.Sega R&D news footage of Feb 1990.]
- ↑ [Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #980382 by MrLordSith Sonic Retro forum thread: Sonic the Hedgehog (Prototype); post #980382 by MrLordSith]
- ↑ The Cutting Room Floor: Proto:Sonic the Hedgehog (Genesis)#Unused Object Positions
Sonic the Hedgehog (16-bit) (prototype), prototype version of Sonic the Hedgehog (16-bit) | |
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