Sonic Adventure 2/Beta elements

This article pertains to the beta elements of of Sonic Adventure 2.

Knuckles/Rouge Radar
There appears to be graphics for the Emerald Radar in the game files that would have most likely been used as a part of the mechanic, but were ultimately unused.

Random Rings
There is a Item Box image of a Ring with a question mark on it in the game files. According to the original file name, this would have given the player a random amount of Rings.

Early menu graphics
There are a variety of unused texts related to various aspects of the game, such as Chao Races or the scrapped World Ranking from the Dreamcast version which uses Japanese texts.

TV setting title graphics
There are two sets of TV settings graphics that go unused in the final version. They would have been placed in the upper-left hand corner of the menu like all other graphic mechanics.

Unused multiplayer screen
There are two graphics in the rom of the Dreamcast disk. It is implied via their file name in the game that they were meant to be used in the multiplayer.

Unused tutorial screens
There are videos for explaining Level Up Items and special attacks that do not appear in the gameplay, though they can still be found inside the characters files.

Unused objects
There are some unused objects in the Stages on the Dreamcast version of the Stage, often in inaccessible places. Others can still be interacted with, but are simply invisible.

Iron Gate
After the first locked door, there is a room with an elevator that leads to a tight tunnel. Before the room that the tunnel leads into, there is a Dash Panel inside the wall on the right.

White Jungle
Near the start of the Stage, there is a misplaced Dash Panel right below the starting tunnel. Additionally, there are two additional Dash Panels slightly below the one Shadow uses at the beginning of the starting tunnel, rendering them useless. These are both present in the GameCube version.

There are more objects out of view that suggest this Stage went through significant changes during development. These objects include floating platforms, a couple of Ring trails, more Dash Panels, two Invincibility Item Box, a weird spinning object, and numerous Beetle Series enemies. These objects do not seem to have much connection to anything and outside the player's reach without cheat codes.

These objects are rearranged on the GameCube version. They contain the same kind of format, but the Item Boxes and the odd spinning object are gone, and the Beetle Series enemies perform different actions. After Shadow touches the Stage's Goal Ring, four rings appear off-screen. These Rings are in an uneven layout for some reason, and cannot be collected before the game ends.

Meteor Herd
If one uses hacks to play as Sonic or Shadow in Meteor Herd, a hidden Grind Rail can be found. One end begins at the central tower, leads sharply downwards through two successive loops, and ands near the starting point.

Final Chase
If the player makes Shadow turns around and grinds backwards on the starting Grind Rail, he will eventually encounter an off-screen Spring that bounces him into a bottomless pit.

Black Market
The market was going to appear in the Dreamcast version of the game before it was scrapped and ported to Sonic Adventure 2: Battle.

Playground
Game files in the game show that a playground was going to be included in the Chao Garden.

Library
There was at one point going to be a Library, which the player have been able to access from the Kindergarden. In the library, the player could have downloaded or create new stories for Chao Adventure 2. While this was never fully implemented, Chao Adventure 2 still has the modular design needed to support multiple stories. The disc has one file (OSAMPO2S) representing a blank Chao Adventure 2 VMU program with no Chao or stories loaded, which is combined with the Chao data and story files. It is possible to run the blank program on a VMU without crashing, and it displays a message that no Chao is available. The disc has ten story files, with two files for each language.

World Rankings
As mentioned above in the Unused Graphics section, there was World Ranking system functionality that was going to be ported into the Dreamcast version, but remained unused in the game itself. Instead, it remains in the hold inside the game CD. There are also flags from several countries in the real world that still exist in the game's files.

Unused voice clips

 * "Those robots are a total pain in the-" - Sonic, just before Shadow appears and uses the Chaos Control for the first time.
 * "There's a dead end up ahead. Spread out and find them." -This dialogue is used in the Japanese audio track for the scene where Tails decides to intercept the President's limo to figure out where Eggman is, but is mysteriously removed from the English version.
 * "What?! A ghost?."- A more frightened version of Knuckles' speech before fighting the King Boom Boo.
 * "We may be partners, but this doesn't mean I trust you."- Eggman would have said this right at the end of his first encounter with Rouge.
 * "Bad day or what?"-Replying at Eggman's.

Unused missions texts
Within the file containing the text for each Stage's missions, two Stages have unused text:
 * 1st Mission: Make sure we debug this!
 * 2nd Mission: Find 100 bugs!
 * 3rd Mission: Find bugs that you could not find!
 * 4th Mission: Debugged in 2 minutes!
 * Last Mission: Try bug 0!

Super Sonic and Super Shadow
Within the game's text, there are lines indicating that Super Sonic and Super Shadow were meant to be unlockable characters in the game's 2P Vs. mode:
 * "Congratulations! You've cleared Green Hill with Rank A. Strongest characters are now available to use in Sonic and Shadow 2P versus mode."

They also had profiles that read "SUPER SONIC/SUPER SHADOW Powered by the 7 Chaos Emeralds. Amazing speed and moves, but dies if rings are lost."

Metal Harbor
If one were to play Metal Harbor with a second controller plugged in and press on that second controller, Sonic will star using his boarding mechanics, even though he does not have a board. This is most likely a debug function that was not properly disabled before release, seeing as having this left in does not give any advantage to completing the level. This was fixed in Sonic Adventure 2: Battle.

Unused menu themes
Character menu themes for the game were originally meant to be downloaded online. However, the Shadow, Amy, Omochao, Maria, and Secretary themes were never made available, therefore making their audio and graphics unused. The themes are still available in Sonic Adventure 2: Battle, with the Amy, Omochao, Maria, and Secretary themes being unlockable in the game.

Sonic Adventure 2: The Trial
A demo/prototype of Sonic Adventure 2 which was released with Phantasy Star Online for the Dreamcast as a bonus disc. The only playable stage is City Escape with a slightly different instrumental version of the song playing as BGM. In this version Sonic wears his traditional shoes instead of his Soap shoes, the cutscenes' subtitles and also some of the sound effects are different as well. Some of the posters in City Escape are different and are promoting PSO. After finishing City Escape a trailer is played which lacks Miles "Tails" Prower and Rouge the Bat leading to the belief that they were added later in development.

Unused graphics
There is a City Escape map seen in the game files for the demo, but not used in the final version.

Other characters icons
During the early stages of Sonic Adventure 2, it is rumored that only Sonic, Knuckles, and Eggman would be playable characters. This is supported by the video that plays in the demo if the player lets the title screen idle for long enough, which only features game play of Sonic, Knuckles, and Eggman. Whether the rumor is true or not, the others (Tails, Shadow, and Rouge) are definitely implemented into the game at the time of the demo's release, because they have icons for collecting a life capsule.

Unused capsules
The Bomb and the Health capsules were unused in this version but in the game files, though they are later used in the final version. However, the Random Rings are still unused in both versions.

Sonic Adventure 2 [Preview]
This preview version was sent to the press as a sneak peek to the game. One of the most notable differences from the final version is the menu screen which allows the player to choose between Hero or Dark sides. Upon selecting any of the sides the player can choose to play with any of the side's corresponding characters.

There is also a 2P vs. mode in this release. Upon selecting this mode the player can choose between three battles: Sonic vs. Shadow, Tails vs. Eggman and Rouge vs. Knuckles. There are some other differences in this version such as different sound effects, music tracks and voices.

This version seems to lack proper sound programming since the musics and voice clips are being played almost completely randomly.