Shadow the Hedgehog (シャドウ・ザ・ヘッジホッグ Shadō za Hejjihoggu?) is a video game for the Sonic the Hedgehog series developed by Sega Studio USA and published by Sega. It was released for the Nintendo GameCube, PlayStation 2 and Xbox consoles in late 2005. The game stars Shadow the Hedgehog and his quest to recover his memory, a goal he has been pursuing since Sonic Heroes, while an evil alien race known as the Black Arms is invading the earth.
The game received generally unfavorable reviews from critics who criticized its controls, the addition of weapons into Sonic gameplay and other mature themes (such as swearing) although it was praised for its replay value.
- 1 Plot
- 2 Gameplay
- 3 Characters
- 4 Stages
- 5 Other modes
- 6 Development
- 7 Cast
- 8 Music
- 9 Reception
- 10 Re-releases
- 11 Trivia
- 12 Videos
- 13 Notes
- 14 References
- 15 External links
After the events of Sonic Heroes, Shadow has abandoned Team Dark to uncover the truth of his past. Near Westopolis, he struggles to cover all the pieces with the few memories he has, which have Maria Robotnik aboard the Space Colony ARK being shot by a GUN Soldier in front of his face. Then, a newspaper with the headline of celebrations taking place now that the Black Comet has come back after its fifty year cycle blows by in the breeze, catching on Shadow's leg, then blowing off into the distance.
As Shadow ponders his past, a gaping hole opens up in the sky over the city. Strange black and red creatures descend from the clouds and begin to cause pandemonium in the city. Shadow turns to leave, not caring about the humans' fate until someone calls out his name. A large floating figure, known as Black Doom, appears and tells Shadow to bring him the Chaos Emeralds "as promised" before disappearing in multiple explosions. Fueled with desire to seek out his past and find the truth behind Black Doom's words, Shadow speeds off into the city.
The story's progression will depend on the player's decisions and actions in the environment, collecting the seven Chaos Emeralds in the progress. At the end, the player will have an ending depending on their actions:
- If the player gets to GUN Fortress and does the Dark mission, Shadow will have a battle against Diablon and Sonic. After defeating them, Shadow will be granted the last Chaos Emerald. A weakened Sonic then will ask Shadow what he plans to do with the Emeralds, to which Shadow will reply that he will use them to destroy the planet.
- If the player ends up in GUN Fortress and does the Hero mission, then Shadow will have a showdown against Black Doom, enraged because Shadow betrayed him. After defeating Black Doom, Shadow will get the last Chaos Emerald. With all the Emeralds, the hedgehog says that he will conquer the universe.
- If the player goes to Black Comet and does the Dark mission, Diablon and Sonic will fight Shadow, only to be defeated. Then Shadow will be granted the last Chaos Emerald, and will say that he will become Black Doom's minion and that the Black Arms will conquer all of earth.
- If the player does the Hero mission in Black Comet, he and Knuckles will fight Dr. Eggman and his Egg Dealer. After defeating the doctor, Shadow will get the last Chaos Emerald, and he will say that he knows what is best for himself and will strike down Eggman.
- If the player gets to Lava Shelter and does the Dark mission, Eggman will fight Shadow using the Egg Dealer, but will be defeated. Shadow will then get the last Chaos Emerald. Thinking that he is just a Shadow Android made by Eggman, Shadow will say that will use the Chaos Emeralds to be more powerful than the original one before proceeding to strike down Eggman.
- If the player goes to Lava Shelter and does the Hero mission, he and E-123 Omega will fight Dr. Eggman and his Egg Dealer. After defeating the doctor, Shadow will get the last Chaos Emerald. Thinking that he is a copy of the real Shadow made by Eggman, Shadow will say that he will use the Emeralds to take over the Eggman Empire, and then he and Omega will strike down Eggman.
- If the player ends up in Cosmic Fall and does the Dark mission, Shadow will fight against Eggman and his Egg Dealer. After winning, Shadow will get the last Chaos Emerald. He will then say that he will protect the Space Colony ARK for the rest of his life, and will force an injured Eggman to leave the space colony and never return.
- If the player does the Hero mission in Cosmic Fall, Shadow and Vector will fight Black Doom. After he wins, Shadow will get the seventh Chaos Emerald, though he will claim that he was a failure that caused disasters and that should never been created and leave in a sad mood. In the way, Vector will try to consulate him.
- When the player gets to Final Haunt and does the Dark mission, Shadow will fight Diablon and Sonic, whom he wants to settles the score with him and Sonic agrees. After winning the fight, Shadow will get the last Chaos Emerald, and say that he will be the most powerful hedgehog in the world with the Emeralds in his hands.
- If the player ends up in Final Haunt and does the Hero mission, Shadow and Sonic will fight Black Doom. After the heroes win, they will get the last Chaos Emerald, and Shadow will say that he will take down the Black Arms with Sonic supporting him.
All of the aforementioned endings are actually distortions of the truth. The true story of Shadow's past is told in the Last Story, which can only be unlocked by obtaining all of the previous endings.
In the Last Story, Shadow is confronted by Black Doom after gathering all of the Emeralds. Black Doom commands him to give up the Emeralds so that they can begin the 'Ritual Of Prosperity'. Sonic and the others (including Eggman) then arrive and tell Shadow not to listen to the alien leader. After it is revealed that Black Doom wishes to harvest humans as an energy source, he takes the Emeralds from Shadow and uses Chaos Control to warp the Black Comet down to the surface of the planet.
Black Doom then explains that he helped Professor Gerald create Shadow, but only in return for the Chaos Emeralds, which were needed to bring the comet down to the surface. This reveals that Shadow was actually created using Black Doom's DNA. As Eggman is in disbelief that his grandfather would betray the planet just for research and helping the Black Arms, Black Doom paralyzes everyone with a special gas being emitted from the comet and leaves them to be devoured by his alien offspring. As the end seems near, Shadow suddenly hears Maria asking for help and he breaks through the paralysis. Black Doom flees, leaving behind Shadow, the only hope for the planet.
Shadow catches up with Black Doom, and suddenly is attacked by mind control. Black Doom tells him that he can control him as they have the same blood running through their veins. Shadow refuses to believe it as the scene switches to the ARK, where Charmy Bee, Vector the Crocodile, and Espio the Chameleon race to hack data disks that they found earlier in the game. This room seems identical to the one where Gerald's first video in Sonic Adventure 2 is activated. They finally get inside, and Charmy activates a film showing a sane Professor Gerald Robotnik. He refers to Shadow as his "son" and tells him that he is the only hope for the planet. It is revealed that the only way to defeat the Black Arms is to destroy the Black Comet using the Eclipse Cannon, a powerful weapon built into the ARK. As the video ends, Maria steps into the frame and gives Shadow the inspiration he needs to break through Black Doom's control. Black Doom escapes and prompts Shadow to use the Chaos Emeralds to become Super Shadow and fight the alien leader. Black Doom (now in his Devil Doom form) fights Shadow and is defeated.
Shadow then uses a super-powered Chaos Control to warp the Black Comet back into the planet's orbit and tear it apart with a blast from the Eclipse Cannon. Everyone below in Earth cheers in joy as the alien threat is destroyed forever. In one final scene on board the ARK, Shadow looks at a picture of Maria and Gerald before happily tossing it away as he leaves the room, remarking "Goodbye forever... Shadow the Hedgehog".
Shadow the Hedgehog is a 3D third person shooter action platforming video game, which plays similar to past 3D Sonic games such as Sonic Heroes. Over the course of the game two of three different factions will be present in each stage: the Black Arms, GUN, and the Eggman Empire. They will usually be seen attacking each-other, but will all try to attack the playable character regardless. However, GUN enemies will not attack the player in Lost Impact.
The player mainly controls Shadow the Hedgehog. For some missions, Shadow also teams up with various characters from the series, such as Amy Rose, Charmy Bee, Doom's Eye, Dr. Eggman, E-123 Omega, Espio the Chameleon, Knuckles the Echidna, Maria, Miles "Tails" Prower, Rouge the Bat, Sonic the Hedgehog and Vector the Crocodile. Some of these characters can be controlled by a second player in the PlayStation 2 and Nintendo GameCube version of the game by connecting a second controller and playing in a "co-op mode". These characters can run, jump, and attack under the second player's influence. Some allies have different attacks compared to the other allies however:
- Amy: Can perform the Punch and Jump Dash.
- Espio: Can perform kicks and chops and a a small Jump Dash.
- Knuckles: Can perform the Punch, but slightly differently from the other allies' punches, and the Jump Dash.
- Omega: Can Attack with his arms, but differently from others punches and Jump Dash.
- Maria: Can Punch, but only jump one foot off the ground and cannot use the Jump Dash.
- Rouge: Can perform kicks and the Jump Dash.
- Sonic: Can perform the Homing Attack and Punch. Sonic's Homing Attack in particular can aim towards targets outside the usual range/angles.
- Tails: Can perform the Tail Swipe and Jump Dash.
- Vector: Can bite the enemy and perform the Jump Dash.
When a player does not control the ally however, they are controlled by an AI by default. In these instances, they will act differently compared to the others. If it is a playable ally, then they will attack any nearby enemy if Shadow gets within range. Some allies will use their attack and others will jump to attack an enemy. Hero allies will always attack Eggman's mechs and Black Arms soldiers. The allies overall act as combat support and guidance and give help to Shadow should he need it.
Similar to past games, Shadow can use most of his basic abilities: He can run, jump and Jump Dash/Homing Attack, as well as Spin Dash, Light Dash, Slide, Triangle Jump and perform a punch-punch-kick combo. He also has the ability to drive vehicles that he finds or commandeers. In addition, Shadow the Hedgehog also makes use of a weapon system. Ranging from pistols and machine guns to close combat weapons, Gatling guns, bazookas, and even laser rifles, weapons are commonly found in Containers and dropped by defeated enemies. When a weapon is first picked up, Shadow receives some initial of ammunition for that weapon; more ammunition can be gathered by picking up more copies of the weapon. Only one weapon can be held at a time, and when Shadow runs out of ammunition for his weapon, he will toss it aside and it disappears.
Shadow has two gauges he can fill depending on how the player makes him act towards enemies/allies. When Shadow fills up either gauge to the maximum, he enters a state where he is invincible, gets unlimited ammunition, and can use a specific chaos power that is affiliated with whichever gauge he fills. Destroying Black Arms, healing wounded GUN troopers and civilians, putting out fires and other good deeds fills up Shadow's Hero Gauge. Upon filling the gauge, Shadow becomes Hero Shadow and can activate Chaos Control, which lets him fast forward through the stage, attack enemies, and slow down time in boss battles, until the Hero Gauge is empty. Defeating GUN troops, environmental objects and healing Black Arms fills up Shadow's Dark Gauge. Upon filling this gauge, Shadow becomes Dark Shadow and can use Chaos Blast, which destroys or damages anything and anyone near him. Destroying Eggman's mechs can fill either gauge depending on which other faction they are fighting.
Shadow the Hedgehog has nonlinear gameplay, which allows the course of the story to change according to the decisions the player takes. Most stages, with some exceptions, have three different types of missions: Hero, Dark and Neutral. The Hero and Dark missions usually have the player doing some tasks such as killing multiple enemies or interacting with certain objects, whereas the Neutral missions just have the player heading to a Goal Ring. However, it is possible to end a stage in a mission the player did not intend to complete.
Six special weapons can be unlocked in the Story mode by completing enough missions. These weapons are contained in Special Weapon Containers. The first five are each unlocked by completing either the Hero or Dark mission of one of the five Stages (and their ammo can be increased by completing both the Hero and Dark missions). The last special weapon, the Shadow Rifle, is unlocked upon completion of the Last Story.
As with past Sonic games, Shadow the Hedgehog's stages have Rings scattered in them. Rings serve as the playable character's main method of protection; if the player gets hit while having at least one Ring, they will survive with the cost of losing ten of their Rings. However, should the playable character suffer damage without having any Rings on them, the player will lose a life, or get a Game Over if they run out of lives.
Shadow the Hedgehog uses the traditional A through E ranking system. A certain minimum total point score is required to earn each ranking, with A being the most points and E the ranking earned when less than the required number of points for a D are earned. The number of points required for each ranking varies between stages and between missions within each stage. There are also three types of points earned during a stage, and the way the total score is calculated depends on which mission is completed. Normal points are earned by collecting Rings and items; Dark points are earned by killing GUN troops (and sometimes Eggman's mechs depending on who the opposing side it) and things in the environment. Hero points are earned by killing Black Arms (and sometimes Eggman's mechs depending on who the opposing side it), healing wounded GUN troops and civilians, and putting out fires. The player's total score for Normal missions equals their Normal score plus their Time Bonus (Hero and Dark scores are ignored). Their total score for Dark missions equals their Normal score plus their Dark score plus their Time Bonus minus their Hero score, and their total score for Hero missions equals their Normal score plus their Hero score plus their Time Bonus minus their Dark score. By earning an A rank for all stages, "Expert Mode" will be unlocked.
|Button formation||Character movement|
|Nintendo GameCube||PlayStation 2||Xbox|
|Control Stick||Left Analog stick||Left Thumbstick||Move|
|C Stick||Right Analog stick||Right Thumbstick||Rotate camera|
|while in midair||while in midair||Jump Dash/Homing Attack/Triangle Jump|
|Spin Dash/Dark Spin Dash/Light Dash/Pick/Interact with object|
|Control Stick +||Left analog stick +||Left analog stick +||Slide|
|as Hero Shadow||as Hero Shadow||as Hero Shadow||Chaos Control|
|as Dark Shadow||as Dark Shadow||as Dark Shadow||Chaos Blast|
|START||Pause the game|
Gimmicks and obstacles
- Amy Rose (Co-op mode)
- E-123 Omega (Co-op mode)
- Espio the Chameleon (Co-op mode)
- Knuckles the Echidna (Co-op mode)
- Maria Robotnik (Co-op mode)
- Miles "Tails" Prower (Co-op mode)
- Rouge the Bat (Co-op mode)
- Shadow Android (2P Vs. Player Mode)
- Shadow the Hedgehog
- Sonic the Hedgehog (Co-op mode)
- Vector the Crocodile (Co-op mode)
- Black Doom (first appearance)
- Devil Doom (first appearance)
- Dr. Eggman
- Charmy Bee
- Cream the Rabbit
- Gerald Robotnik
- Commander (first appearance)
- Black Bull (Lethal Highway Hero; Death Ruins Hero)
- Black Doom (GUN Fortress Hero; Cosmic Fall Hero; Final Haunt Hero)
- Blue Falcon (The ARK Dark/Neutral)
- Devil Doom (The Last Way)
- Diablon (GUN Fortress Dark; Black Comet Dark; Final Haunt Dark)
- Egg Breaker (Cryptic Castle Dark/Neutral/Hero; Mad Matrix Dark/Neutral/Hero; Iron Jungle Dark/Neutral/Hero)
- Egg Dealer (Black Comet Hero; Lava Shelter Dark/Hero; Cosmic Fall Dark)
- Heavy Dog (The Doom Dark)
- Digital Circuit/Glyphic Canyon/Lethal Highway
- Cryptic Castle/Prison Island/Circus Park
- Central City/The Doom/Sky Troops/Mad Matrix/Death Ruins
- The ARK/Blue Falcon/Air Fleet/Iron Jungle/Space Gadget/Lost Impact
- GUN Fortress/Black Comet/Lava Shelter/Cosmic Fall/Final Haunt
When selecting 2P Mode on the game's main menu, the players will be able to choose an aspect for their Shadow Android, though it will not affect gameplay. Then, the player will have to choose three different stages to play in: Air Fleet, Lava Shelter and GUN Fortress, with Radical Highway used. They can also select 3-Stage so that the game will pick up a random stage.
2P Mode plays mostly the same as Story Game; however, the players will not be able to transform into Dark or Hero Shadow. Both playable characters will start at different points of the stage, near the center of it. If a player is hit without having any Rings left or falls into a bottomless pit, the opponent will be declared the winner. After three fights, the game will end and the players will be taken back to the title screen.
Shadow the Hedgehog was developed by Sega Studio USA, the later defunct division of Sonic Team in the United States. Takashi Iizuka served as the writer and director of the game, while the Sonic co-creator Yuji Naka was the producer. The development team wanted to develop a game that would attract a teen audience, using Shadow as the protagonist due to his popularity amongst Sonic fans and him fitting with a "gun action" game the best. They also felt that Shadow's design, which was inspired by films such as Underworld, Constaine and Terminator, would allow for a darker story and the inclusion of new elements, such as guns and vehicles, normally considered innapropiate in a Sonic game. During development, the team wanted to make the game featuring Shadow finding out about his past and solving the mysteries about it that first appeared in Sonic Adventure 2.
Shadow the Hedgehog is notable for its profanities and use of weapons. The decision of including this was made early during the game's development, mainly because of its intended mature tone. Back then, the ESRB had given the game a "T" (teen) rating for "cartoon violence" and "language". However, that same year, the ESRB had created a new "E10+" rating, and as such, Sega was forced to censor many scenes of the game so that it could fit in the new rating. The ESRB ultimately assigned the game an E10+ rating for "fantasy violence" and "mild language".
In this game, Sega decided to hire the 4Kids voice actors who were cast for Sonic X for the Sonic the Hedgehog games as well, with their debut featured in Shadow the Hedgehog. This move was poorly received by fans, with many criticizing the 4Kids actors as either trying to imitate their predecessors too much, or being unsuitable for their roles. Despite protests by fans, as well as a long running campaign by former Sonic voice actor Ryan Drummond to return to the role, the 4Kids voice actors were kept up until Sonic Free Riders in 2010 where the cast was replaced once more except for Mike Pollock, the voice of Doctor Eggman.
The vocal tracks were released on an album in February 2006, entitled Lost and Found: Shadow the Hedgehog Vocal Trax. They are:
- "I Am... All of Me" by Crush 40 (Intro song, Main theme, and Final Boss theme)
- "Almost Dead" by Powerman 5000 (Pure Dark ending theme)
- "Waking Up" by Julien-K (Neutral ending theme)
- "E.G.G.M.A.N. Doc. Robeatnix Mix" by Lee Brotherton and his Remix Factory (Eggman's theme)
- "The Chosen One" by A2 (Semi-Hero ending theme)
- "All Hail Shadow" by Magna-Fi (Pure Hero ending theme. Following games often use this as Shadow's theme as opposed to the others)
- "Never Turn Back" by Crush 40 (Last Story ending theme)
Shadow the Hedgehog received mixed reviews from critics upon its release; the Nintendo GameCube, PlayStation 2 and Xbox versions are respectively rated 51%, 45%, and 49% on Metacritic and 53%, 49%, and 52% on GameRankings. By May 17, 2006, the game's worldwide sales total exceeded one million. The game was later released as a part of two budget lines—Greatest Hits for the PlayStation 2 (this represents sales of at least 400,000), and Player's Choice for the GameCube (250,000).
Much criticism stemmed from the unwelcome sense of maturity and, in particular, the addition of guns. Game Informer staff writer Matt Helgeson said that "not only is this new 'adult' interpretation of Sonic painfully dumb, it’s also ill-advised and almost feels like a betrayal to longtime fans." Eurogamer staff writer Tom Bramwell felt that "the game's other selling point – its darker edge – [is] not really meant for us." G4 sX-Play and GameSpy staff writer Patrick Klepek thought similarly. In contrast, Nintendo Power staff writer Steve Thomason rated the game 8.0 out of 10, stating that "[t]his darker take on the Sonic universe succeeds for the most part, giving the series a bit of an edge without going overboard on violence." However, in the last issue of Nintendo Power, Thomason would go on to say that giving it this rating was his worst mistake while working on the magazine and described the game as an "abomination".
The game's controls were criticized, especially because Shadow's homing attack caused unexpected character deaths. Game Informer's Matt Helgeson complained that the attack "frequently sends you careening off into nothingness, resulting in cheap death after cheap death." Nintendo Power, X-Play, Eurogamer, Official Xbox Magazine, and GameSpy agreed. Other complaints focused on the mechanics of weapons and vehicles. Greg Mueller of GameSpot felt that the guns were nearly useless because of a lack of an aiming ability. IGN staff writer Matt Casamassina, 1UP.com staff writer Greg Sewart, Game Informer, X-Play, GameSpy, and London's The Times also criticized the mechanics of Shadow's weapons and vehicles, and other aspects of the game's controls. However, Nintendo Power claimed that "blasting Shadow's foes with the wide variety of weapons at his disposal is just plain fun."
The many possible paths through the game caused reviewers to praise the game's replay value. Rating the game 8.3 out of 10, GameTrailers stated that "this choose-your-own-adventure style gives the game replay value that many platformers lack." The Melbourne, Australia, publication Herald Sun, and Official Xbox Magazine thought similarly. Nintendo Power agreed, although criticizing the difficulty of the missions that require the player to locate objects. GameSpot praised the game's variety of levels and its music. Despite of the overall mixed to negative reception, Shadow the Hedgehog was voted the best game of 2006 in the Official Jetix Magazine Reader Awards.
|PlayStation 2||Released in a compilation with Sonic Mega Collection Plus as the Sega Fun Pack: Sonic Mega Collection Plus & Shadow the Hedgehog Sega Fun Pack. It was released in 2008.|
- There are few differences between each version. The GameCube version maintains the steadiest framerate, but only has one voiced language available (Japanese in the Japanese release, English elsewhere). The Xbox version contains dual languages dependent on system settings, but is the only version that does not allow a second controller to play as a mission helper (only the flying characters Eggman, Charmy and Doom's Eye could not be controlled in other versions). The PlayStation 2 version is often remembered as the least favorable port, having gameplay glitches and no ability to clean pause as well as framerate issues, but at least containing freely selectable languages.)
- Some G.U.N. soldiers shout, "Mr. Yuji Naka is all right!", an obvious reference to the former head of Sonic Team.
- Since this game is similar to Sonic Heroes in graphics and other subjects, Knuckles is the only one to retain (or have a similar victory pose to) his pose in Sonic Heroes.
- Before the game was released, it was going to take more advantage of the ESRB "T" rating. For example, some FMV scenes had violent extensions (such as the opening showing a lone G.U.N. soldier getting shot in the opening, though he can still be seen bracing for the impact in the final version, and the flashback of Maria getting shot originally showed her fall), the aliens' green blood was originally red, and there were more instances of cursing such as Shadow saying "What the hell was that all about" in the intro and Sonic saying “piss” instead of tick .However, the E10+ rating was created during development, causing some changes between pre-release and the final version. Contrary to popular belief, the Japanese version is not uncensored.
- There are a few tunes from Sonic Adventure 2 reused in the game: Event - Strategy, Blue Falcon (with a remixed techno version of the G.U.N. Mobile boss), Heavy Dog (G.U.N. Mobile with different drums), and 2P vs Battle (a remixed version of Radical Highway). Event - Super Shadow has a small clip of "Live and Learn", the main theme from Sonic Adventure 2.
- Additionally, many levels in this game have names similar to levels from Sonic Adventure 2: Glyphic Canyon (Wild Canyon), Lethal Highway (Radical Highway), Prison Island (Prison Lane), Sky Troops (Sky Rail), Iron Jungle (Iron Gate), Space Gadget (Crazy Gadget), Cosmic Fall (Cosmic Wall), Lost Impact (Lost Colony), and Final Haunt (Final Rush/Chase).
- This game has made the character Vector the Crocodile popular for the line "Find the computer room!" in Cosmic Fall. This line has become an internet meme.
- Big the Cat was the only playable character from Sonic Heroes to not return in this game.
- This is the first Sonic game with an E10+ rating from ESRB and a 12 rating from PEGI. This is due to the game's explicit nature compared to other games in the series, making it what some regard as the darkest, most mature Sonic game ever made.
- However, some other Sonic games are a close second, such as Sonic CD (which features dark art depictions for the Bad Futures, the US version of the Boss, Game Over theme and the "fun is infinite" picture), Sonic the Hedgehog (2006) (which involves Sonic actually getting killed by impalement and hopeless, apocalyptic themes), Sonic Unleashed (which involves Dark Gaia growing extra arms from his shoulders and extra eyes from his mouth while excreting what is presumably green blood and lycanthropy transformations), and Sonic and the Black Knight (which featured Knuckles as Sir Gawain almost committing suicide and focusing on the corruption of King Arthur).
- Additionally, this game is the second Sonic game that uses profanity; for example, when Shadow dies, he says "Damn". The first was Sonic Adventure 2, but only in some of the song lyrics, such as Knuckles' theme song, and the Death Chamber music. The Third game was Sonic Runners, because Knuckles says "Damn" on a few occasions.
- Shadow the Hedgehog was supposed to have an odd type of first-third person view that is indicated by a map similar to other 3rd person shooters such as Gears of War and Ratchet and Clank (refer to the picture on the right).
- Although the game was directed towards a more mature audience, the game was nominated for a Golden Joystick Award for Family Game of the Year in 2006 on the website for the British newspaper "The Sun".
- The game was released on the same day as Sonic Rush was released for the Nintendo DS in North America.
- Sonic is the only assistant character who can use the Homing Attack. This could be due to his involvement in one of the final bosses. This is also the only game in which a Homing Attack (only in Sonic's case as an NPC) can defy certain physics, such as being able to aim straight upward or instantly retaliating after getting hit.
- In one cutscene, Sonic says "Welcome to the next level!" a reference to one of SEGA's mottos.
- This is the first mainstream 3D Sonic game that does not feature Super Sonic as a playable character in the final boss.
- In addition, this is the first mainstream 3D Sonic game where Super Sonic is unimportant to the game's plot.
- However, if players look closely at the flashback Shadow has of the climax of Sonic Adventure 2 during the cutscene prior to Space Gadget as well as the flashback shown prior to Lava Shelter, behind Super Shadow, one can make out Super Sonic due to the Soap Shoes he (Sonic) wore in said game, but is mostly blocked out by Super Shadow due to Super Sonic not being an important part of this game.
- In addition, this is the first mainstream 3D Sonic game where Super Sonic is unimportant to the game's plot.
- The scene where the Eclipse Cannon destroys the president's office is very similar to a scene in the movie Independence Day, where an alien laser beam destroys the White House.
- The symbol of the game that represents Shadow also resembles a tomoe, with extra curves added to represent Shadow's spine.
- The gun that Shadow is holding on the cover is not featured in the actual game.
- As revealed by Ilzuka Takashi at Sonic Boom 2013, Shadow the Hedgehog is the last game released to be part of the Dreamcast Era, while Sonic Advance 3 was the last game of the Dreamcast Era chronologically. Sonic Rush starts off the Modern Era.
- The graphics are almost identical to Sonic Heroes in terms of game-play and some cutscenes. However, the CGI ones in the game use a different graphical style.
- Vector and Omega cannot harm enemies by using the Spin Jump, which is most likely a bug because the NPCs still unsuccessfully try to attack that way.
- Before the game was released, Sonic Team had Sins of a Divine Mother make a song for Shadow's Semi-Neutral story known as Broken; it was not put into the final release and ultimately went unused.
- The adaption of Black Doom's reason for gathering the Chaos Emeralds differs between the English and Japanese version of Shadow the Hedgehog. In the English version, he states that he needed the Chaos Emeralds to teleport the Black Comet down to earth because its velocity was not powerful enough to pass through a planet's atmosphere. In the Japanese version, he stated that the Black Comet is a cyclic comet that never touches a planet, so he needed the Chaos Emeralds teleport it down to the planet.
- The reason behind the characters' paralysis differs between the adaptions of Shadow the Hedgehog. In the Japanese version, Black Doom states that the Black Comet releases a natural gas that, when coming into contact with the Earth's atmosphere, develops into a toxic that paralyzes nerve cells. In the English version, he states that the Black Comet has just released a nerve gas that paralyze its victims when it has spread across the planet's crust.
- Mistakenly, the European box on the back refers to the G.U.N. Commander as "The General".
- In the GameCube version, there exists a huge unused level in the game files. This one includes leftovers from the Egg Emperor's boss arena in Sonic Heroes with the same textures as the original battle arena. The unused level also includes exclusive large buildings, wide bridges and different street signs. These file also has a separate texture image depicting what looks like a city with the same name label as of Westopolis's textures, indicating that this level may be an older version of it.
- The Shadow the Hedgehog Official Soundtrack on iTunes and in CD format is missing at least sixteen tracks compared with the original soundtrack, five of them being some boss tracks including the final fight against Devil Doom and the rest being missing levels. While some would believe that's because of re-used level music, this isn't the case as every level and boss has its own unique music piece.
- The missing Level tracks are: Cryptic Castle, Circus Park, The Doom, The ARK, Air Fleet, Iron Jungle, Space Gadget, G.U.N Fortress, Black Comet, Lava Shelter, and Final Haunt. The missing Boss tracks are: Egg Breaker, Egg Dealer, Heavy Dog, Sonic & Diablon, and Devil Doom.
- According to the library version on the library ID stamp of Shadow the Hedgehog's Renderware engine. Library version uses hexademical numbers and has the form 0xVJNBB where V (3 bits) is the Renderware version, J (4 bits) is the major revision, N (4 bits) is the minor revision and B (6 bits) is the binary revision. Version 126.96.36.199 for instance would be encoded as 0x37000.
- "Shadow the Hedgehog for GameCube Overview". Allgame (26 January 2009). Archived from the original on 15 November 2014. Retrieved on 26 January 2009.
- IGN: Shadow the Hedgehog. IGN. Retrieved on May 5, 2009.
- Shadow The Hedgehog Explodes Onto PS2 Classics. Siliconera (18 June 2013). Retrieved on 13 June 2016.
- Shadow the Hedgehog (English/Japanese ver.). PlayStation.com (Asia). Retrieved on 30 December 2013.
- Shadow the Hedgehog (Nintendo GameCube) United States instruction manual, pg. 26.
- Klepek, Patrick (24 May 2005). Shadow the Hedgehog Preview from 1UP.com. Ziff Davis. Archived from the original on 8 November 2012. Retrieved on 9 February 2009.
- Kemps, Heidi (30 September 2005). Sega's Yuji Naka Talks!. GameSpy. Retrieved on 30 December 2009.
- Castro, Juan (25 August 2005). Shadow the Interview. IGN. Archived from the original on 22 June 2009. Retrieved on 28 January 2009.
- Pallesen, Lasse (23 March 2004). News Article: Sega Confirms Shadow the Hedgehog. Nintendo World Report. Retrieved on 28 January 2009.
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