* SugarWiki/AwesomeMusic: What do you expect from something in the [[AwesomeMusic/SonicTheHedgehog Sonic series]]?
** For themes with lyrics we have all of the ending themes, but especially [[https://www.youtube.com/watch?v=D2Qa2J4j3_8&channel=Elmo185 All Hail Shadow]], and [[https://www.youtube.com/watch?v=_kTBbTSjZpI&channel=blackblur7 I Am All of Me]] for the main theme. Most of the background music also counts.
** And for the final Ending music, we have [[https://www.youtube.com/watch?v=oVIO1t9tYuE Never Turn Back]].
** Listen closely to the song that plays when Shadow transforms into his Super form - Towards the end, the guitar riff from [[https://www.youtube.com/watch?v=rM85TNMnUkA Live & Learn]] can be heard.
** Not necessarily from the game, but m-flo's [[http://www.youtube.com/watch?v=9BRAWLNaA1g remake of Tripod Baby]] for the game is rather interesting.
** It can be argued that music describes what goes on in a character's head in ways that dialogue can't. [[https://www.youtube.com/watch?v=Jl26fda_1PE&channel=blackblur7 The Chosen One]] does a great job at proving this point by explaining how [[WoobieDestroyerOfWorlds Shadow regrets the doom that he brought to the world]], but in the end, he is [[TheChosenOne the last hope for humanity]].
** The [[https://www.youtube.com/watch?v=2wLYtj_yq8E&channel=BrawlBRSTMs3 "Eggman" Remix]]. He's listening to it in-game and there's a full version of it on the soundtrack.
* BaseBreaker: To elaborate, the base was already pretty broken over if Shadow's return in Heroes was a good thing or not. This game did nothing but add fuel to that fire. In fact, this game cemented Shadow as ''the'' most divisive character in the series bar none. To this day, fans are split on whether he is still a good character who's just been the victim of overexposure and bad writing, or a glorified {{Gary Stu}} who should have died after his debut and just does not fit with the whimsical nature of the series.
* BestLevelEver:
** Digital Circuit. And if you like that, you'll like Mad Matrix. Not only is the {{Cyberspace}} concept a very unique one among Sonic levels, but the sections where you race along internet circuits are really fun, and the platforming is quite well-done in the level. Technically there are puzzles, but they require something less than the brainpower of a slug to solve.
** Lethal Highway. Of all the levels in the game, it's the closest in terms of design to the well-received ''VideoGame/SonicAdventure2'', meaning that you can just skate along the highway at full speed, and near the end, it homages [[VideoGame/SonicAdventure Speed Highway]]. It also has motorbikes.
* BigLippedAlligatorMoment: In the ending, Eggman demands for the Chaos Emeralds while sneaking away with Knuckles chasing after him as Sonic and the others start laughing.
* CatharsisFactor: For some people.
* CompleteMonster: BigBad [[NamesToRunAwayFrom Black Doom]], the sinister leader of the Black Arms, essentially tried to torture every living thing on the Earth by paralyzing them with nerve gas (which he got from the Black Comet). After everything had been paralyzed, he and his offspring could then come in, [[OmnicidalManiac and devour everything on Earth]]. This also included Shadow, [[OffingTheOffspring who is Black Doom's biological son]] [[note]]Shadow was created from Black Doom's DNA, as revealed in ''VideoGame/SonicAdventure2.''[[/note]]. [[EvenEvilHasStandards Even Dr. Robotnik himself]] is also disgusted by him.
* CreatorsPet: What half the ''Sonic'' fandom sees Shadow as.
* DeaderThanDisco: Believe it or not, there were a lot more defenders of this game when it was first released. Perhaps due to the increasing backlash towards DarkerAndEdgier Sonic past ''Sonic '06'', the fandom's revulsion towards the game slowly built up to the point that it's nearly as hated as '06.
* HilariousInHindsight:
** The game has quite a bit of swearing. Swearing done by ''[[Creator/FourKidsEntertainment 4Kids]]''.
** Sonic says he "wouldn't be caught dead" using a gun. As we all know, in ''[[VideoGame/SuperSmashBros Brawl]]'', while [[FamilyFriendlyFirearms they're lasers and such]], he can still [[HypocriticalHumor utilize a gun]]. ''VideoGame/MarioAndSonicAtTheOlympicGames'' also has its share of shooting events.
* MemeticMutation:
** "Where's that ''[[AvoidTheDreadedGRating damn]]'' fourth Chaos Emerald?"
*** Fun fact: In ''VideoGame/SonicGenerations'', [[FandomNod Shadow guards that damn fourth Chaos Emerald.]]
** "Find the Computer Room!", which both the fanbase and SEGA launched on top of to create the sneakiest injoke of Summer of Sonic '09 - in particular, putting up confusing signs to the computer room. Of course, it's also in the placeholder for [[http://www.sonic-city.com Sonic City]].
** [[MostAnnoyingSound "You know what they say: The more, the merrier!"]]
** "Mr. Yuji Naka is alright!"
** [[http://i0.kym-cdn.com/photos/images/original/000/652/918/68a.jpg Ow, the Edge.]]
** "THIS IS WHO I AM!"
** "MARIIIAAAAA!"
** "Looks like these black creatures mean business!" and various other quotes in game making fun of the fact that ''everyone'' constantly seems to want to mention what color the aliens are in a way that makes it very easy to pretend the characters are all psychotic racists.
* MoralEventHorizon:
** Shadow puts his current total of five Chaos Emeralds into the Eclipse Cannon and uses it to completely destroy a capital city. But then, this trope is averted thanks to NoEndorHolocaust.
** On a different path, Shadow deliberately tries to kill the fleeing president, who is previously shown to be almost comically upstanding (''and'' to have a great deal of respect for both Shadow and Sonic). Shadow fails to accomplish this as well.
** His final chance to cross it for certain paths can count as a success. In three of the endings, [[spoiler:he decides to kill everyone's favorite eggheaded scientist.]]
** Black Doom's xenoforming of the planet and [[HumanResources consumption of its inhabitants]] was bad enough, but then he had the balls to claim that he's trying to ''save'' humanity. He's either got a serious case of BlueAndOrangeMorality or (more likely) is trying to justify his actions.
* {{Narm}}:
** Black Doom's voice is so ridiculously raspy and exaggeratedly evil (think [[WesternAnimation/InspectorGadget Claw]]), it is very hard to take him seriously. His name certainly doesn't help either.
** To be honest, just about anytime anyone anywhere in this game attempts to be dramatic qualifies as this. There's a reason why this writing staff was completely fired just one or two games later.
** A particular moment is in the [[http://fat.gfycat.com/OldUnfitGalapagosalbatross.gif in-game intro]], where Shadow does a DramaticGunCock with an SMG... by [[GunsDoNotWorkThatWay pumping it like a shotgun.]]
** Many of the [[http://info.sonicretro.org/List_of_Library_sequences library sequences]] have incredibly melodramatic titles.
* NightmareFuel: Taking too long on the Last Story allows you to hear [[spoiler:Sonic, Tails, Knuckles, Amy, and Eggman slowly choking to death on nerve gas, still cheering you on with every last breath]].
* PortingDisaster: This game was built from the same engine as ''Heroes'', and thus the [=PS2=] release of this game suffers from all of the same problems the [=PS2=] version of ''Heroes'' did.
* ScrappyMechanic:
** The weapons actually work better than you probably expect, but the ''vehicles'' are not so polished -- especially the motorcycle that shows up in the intro movie. The walkers work pretty well, though.
** The effectiveness of the weapons depends on what version you're playing. Works pretty well on the Gamecube version but is utterly useless on the PS2 version. Also, the targeting system seems to have issues when it comes to short-ranged weapons, yet works really well once you start getting medium to long-ranged weapons.
** Additionally, no matter which path you take in a level, all the enemies will attack you, which forces you to kill them and have your assist character [[WhatTheHellHero chew you out for it.]] Notable in Cryptic Castle, where Eggman is the Dark assist character, but whether you choose to go with him or Amy, both of them will chew you out when you destroy Eggman's robots. This is especially bad when you ''need'' to defeat enemies to proceed, even if doing so will raise the gauge opposite of the mission you're going for, lowering your score.
** The "hunting" missions of every kind are terribly designed, which really hurt as they comprise about 60% of the whole game. You have no radar, and there are no "extra" enemies/stuff to find if you miss a few, and the only way to backtrack is to keep moving forward until you find another checkpoint. And all of these problems wouldn't be too bad, but the linear stage design just makes them unbearable.
* SoBadItsGood: Amongst the badly BrokenBase, some fans think the [[RuleAbidingRebel barely PG13 violence and language]], ridiculous plot and dialogue, and averaging gameplay make the game a camp masterpiece.
* SoOkayItsAverage: The gameplay pretty much averages out to being... Adequate. The core gameplay works out well despite somewhat slippery controls, and the guns actually work with good auto-aim and decent damage. However, the game suffers from levels with repetitive design, along with missions that make the game even more repetitive.
* ThatOneLevel:
** Cosmic Fall is a MAJOR pain in the ass because of the numerous tricky jumps over rotating platforms, and you'll have to fight with the awkward camera throughout the entire level; good luck beating this level on hard mode! The main saving graces are that both of its missions are to get to the end of the level (one is just further away), and parts of the mission are very fast.
** The Doom is easy to get lost in even with the use of the maps, which are as confusing as they are helpful, and the carrying of the Heal Units slows Shadow right down. Its (slightly) saving graces are that if you see a Heal Unit, you know a scientist is close-by, and how easy it is to use Chaos Blast over and over again thanks to the amount of destructible scenery.
** Even with The Doom slowing things down whichever way you play it, Lost Impact is the hardest, most tedious level in the game. It's slower due to the slow-moving GUN Lifts, with more Artificial Chaos to hunt - not to mention they are a powerful enemy. And on top of everything else, they are just about the only enemy that gives Hero points, so you won't even charge Chaos Control to speed your way in the Neutral mission.
* TheyWastedAPerfectlyGoodPlot: The ''entire premise'' of Shadow deciding whether to be a hero or villain was simplified down to: "Maybe this guy knows about my past... no maybe this other guy." Also, the Good/Neutral/Evil routes barely have an impact on the story, despite massive potential over who would see Shadow as an ally or enemy.
* TrueArtIsAngsty: Possibly the reason the game was created, and a common reason for it to be enjoyed.
* {{Wangst}}: This is the game that inadvertently set Shadow's characterization among the fanbase as this. Ironically, it's also the one where he actually gets over it.
* WereStillRelevantDammit: Some see the game's DarkerAndEdgier turn as Sonic Team doing this.
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