Proto:Sonic Adventure (Dreamcast)/AutoDemo/Stage Differences

This is a sub-page of Proto:Sonic Adventure (Dreamcast)/AutoDemo.

Please elaborate. Having more detail is always a good thing.

Most of the stages, with the exception of Hot Shelter, are present in this build, but not all of them are playable. The following stages will crash the game if the player attempts to access them:

• Practice (Acts 1 & 2)
• Windy Valley
• Twinkle Park
• Sky Deck
• Lost World
• Mystic Ruins
• Chao (with the exception of the Station Square Garden)
• Boss stages (with the exception of Chaos 2)

Patches to fix Twinkle Park, Sky Deck, and Lost World are available in their respective sections. Note that these restorations currently have issues running on Demul and real hardware, so it's recommended to instead run this in Reicast and variants.

Sub-Pages

Test Levels Three test levels whose slot was later overwritten by Amy's Hedgehog Hammer minigame.

Emerald Coast Rather empty compared to the final game, even lacking the killer whale section.

Windy Valley Completely disparate to the final version, and the same one shown in early showcases of the game.

Twinkle Park The old Act 1 object layout is still here, although the unique objects aren't, and is very empty.

Speed Highway Probably Sonic's most functional stage in the prototype, as well as having the old Act 3 design.

Red Mountain One of the more complete stages in the prototype, complete with Tokyo Game Show tutorials! Be prepared to fight the camera as Sonic, though.

Icecap Ice crystals everywhere!

Casinopolis Extremely rough, with only basic modelling done, and nearly lacking all objects.

Final Egg About in the same state as Emerald Coast.

Bosses Either mostly finished or barely started.

Adventure Fields Either boots the player out or just crashes, but still has some design leftovers from earlier builds.

Chao Gardens An early state of an A-Life Garden.

Lost World

There are scant few changes to Lost World's geometry - one being that the demo lacks the background walls from many of the areas throughout the level. However, the level's object layout has many differences compared to the final version.

Act 1

• The starting room has an open ceiling that was covered up in the final.
• There are flaming arrow shooters near the start of the stage.
• There is an extra Boa-Boa at the start of the stage.
• There is a dash panel missing before the long tunnel of flaming blocks.
• There are no platforms after the long tunnel of flaming blocks.
• There is no item box over the spike pit.
• The checkpoint is missing.
• The camera messes up when the player enters the snake room.
• The snake room is completely different. The platforms are in different locations and the route to complete the puzzle is different.

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  Act 1

Act 2

• The mirrors are missing in the dark room.
• There is a Boa-Boa in the dark room that is replaced with a Sol in the final. Interestingly, the Boa-Boa is still here in Knuckles' version of the stage in the final, though glitches are required to access the room.
• There are no arrows at the end of the dark room.
• There are no rings in the water slide.
• The layout of the light puzzle is different. There are Boa-Boas here and all the switches are situated on high platforms in different spots to the final.
• The wall panels in the light room are already connected to each other, rather than being separated initially.
• The switches for the wall panels in the light room have bright lights over them. This was removed in the final.

Act 3

• No Egg Capsule.
• There is no door behind the starting position.

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  Act 2

Sky Deck

Sky Deck is relatively far along compared to other stages, being the only "broken" one that can be completed as Sonic.

General

• The ship does not go below the clouds. Examination of the texture container reveals that the dark sky texture has not been implemented, however the lighting data is already setup for it.
• The object layout for Sonic seems to be slightly outdated, with random spiked balls present where barriers would (presumably) have been placed.

Act 1

• The second rotating pole is turning the opposite way.
• There's no alternate routes where the first checkpoint is.

• The dash panel after it will likely push the player through the floor.
• The second dash panel is placed slightly differently.
• The rings are placed lower.
• There's no Speed Shoes monitor.
• An area near the end is missing.
• You can go to Act 2 without destroying the cannon.
• The lighting files are present, but don't seem to be any different to the final version.

Act 2

• The stage is slightly different.

Proto	Final

• The beginning is missing a lot of objects.
• The jump panel trail is missing.

• The wing won't sheer off.

Act 3

• The stage is slightly different.

Proto	Final

• Most objects are missing.
• An extra object, OCARRIER3, is present.
• There's no invisible wall near the capsule.
• Knuckles' SET file is identical to Tails' unused version.

Other Stages

This needs some investigation. Discuss ideas and findings on the talk page. Specifically: What objects are different for these levels, if any?

Sky Chase

There are some object changes in both Acts of Sky Chase:

• Act 1 only has one type of enemy, the HODAI. In the final, two more types, RENZAKO and ZAKOS, were added.
• Act 1 and Act 2 have the same object layout.

There is also a third object layout that does not exist in the final. It references a number of odd objects, including the unused Dragon. It can be found in SETSHTS.BIN.

Three paths also exist but all are unreferenced; the first one matches closely with the object layout, the second one is literally a straight line, and the third one is an oval with very sharp turns.

(Source: Sonic Retro)

Sand Hill

SETSBOARDS.BIN is the only object file for Sand Hill and is much smaller than any of the three files used in the final.

Twinkle Circuit

The only Act of Twinkle Circuit in the AutoDemo is an early model that doesn't resemble any of the courses used in the final game. It has no music, objects, or textures and features multiple small inclined areas that aren't seen anywhere in the final, in any course.

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