History VideoGame / SonicAdventure

** In E-102's story, Eggman keeps putting E-102 in competition with his brothers to see who's the "best"--first with E-101 Beta at the start of his story and then with E-103, E-104, and E-105 in the competition to find Froggy--for no apparent reason. It doesn't help that he punishes the losers with {{Painful Transformation}}s that make them more violent and occasionally monstrous.

** Eggman's decision to turn the hunt for Froggy into a contest between the E-100 units is superfluous to the plot--he dismisses the losers because they find the wrong frogs, which is more a matter of incompetence than losing. (Would they have avoided his wrath if they came back empty-handed?)

* IOweYouMyLife: Not directly stated, but Gamma's resolve to rescue the animals trapped inside the E-Series robots was partly due to Amy saving its life. Said act by Amy was also provoked by Gamma freeing her and Birdie from Eggman's cell inside the Egg Carrier (which would later crash land into the ocean) making it both issued and returned at the same time.

** Eggman's decision to turn the hunt for Froggy into a contest between the E-100 units is superfluous to the plot--he dismisses the losers more for incompetence than for losing.

* ConflictBall: Knuckles' fight with Sonic relies heavily on ContrivedCoincidence and PoorCommunicationKills, what with Knuckles immediately attacking and demanding the Master Emerald shards after catching a mere glimpse of the green Chaos Emerald that Sonic is actually holding.

** More infamous is [[SpellMyNameWithAnS Chaclon/Chacron]], a Chao that shows up in the Chao Races upon their completion. What makes him a cheater is that he's constantly in the "boost" state and runs right past the tree he's supposed to shake. He graciously gives the competition a head start, but once that time is up, he'll burst right out of the gate.

* InsultBackfire: Sonic greets his arch-nemesis as "Eggman", who protests that his name is Dr. Robotnik. Later on, the doctor makes "EGGMAN" the password to the Chao Garden on the Egg Carrier -- he even boasts in the English version of ''VideoGame/SonicFrontiers'' that he took Sonic's insult and made it a name to be feared. This isn't present in the Japanese versions, where Eggman has always been the doctor's name -- instead, Sonic makes a simple remark that it's been a while since they've seen each other.

* InsultBackfire: Sonic greets his arch-nemesis as "Eggman", who protests that his name is Dr. Robotnik. Later on, the doctor makes "EGGMAN" the password to the Chao Garden on the Egg Carrier. [[AvertedTrope Averted]] in the Japanese version, where Eggman has always been the doctor's name, so this just doesn't happen -- instead, Sonic makes a simple remark that it's been a while since they've seen each other.

* PooledFunds: Averted; Sonic builds a pile of 400 rings in Casinopolis so he can walk on it to get the Emerald.

-->'''Sonic''': Smooth move, [[JustForPun knucklehead]]!

* {{Mayincatec}}: {{Defied|Trope}}; Sega paid a few developers around $250,000 ''each'' to go down to Mexico and do research on Mayan culture for the game. Consequently, the Mystic Ruins -- and by extension, Sand Hill and Lost World -- are very distinctly based on the Maya rather than using a generic South American aesthetic, which carries over onto Tikal (who herself is named after an ancient Mayan city in Guatemala) and the rest of the Echidna Tribe.

* {{Mayincatec}}: The Mystic Ruins, and by extension, Sand Hill and Lost World, have a very distinctly Mayan aesthetic, which carries over onto Tikal (who herself is named after an ancient Mayan city in Guatemala) and the rest of the Echidna Tribe. Sega paid a few developers around $250,000 ''each'' to go down to Mexico and base the Mystic Ruins after the Mayan temples.

** Chaos for Knuckles, due to the former smashing the Master Emerald and beginning the plot for the latter's story.

* KaizoTrap: Egg Viper. The camera angle isn't great either, so even if you know his suicide attack is coming, you won't be able to tell where he's gonna hit so you may still die anyway. And beware of losing too many platforms, because the Viper will take you down if it's the last platform remaining. Cue rage.

** According to an official Sonic website, [=ZERO=] is the "zeroth" E-Series robot with the official designation of E-100 Alpha.

** The game's story expands on elements from the Japanese manuals of the Mega Drive game, including an ancient tribe guarding the Chaos Emeralds and a dragon fated to destroy the world. Due to other countries replacing these plot points with their own, this led to confusion from these countries of the new direction.

** In the cutscene before the Egg Viper, Eggman sounds strangely nonchalant and confident considering that the last time we saw him he [[VillainousBreakdown had snapped]] following the destruction of the Egg Carrier and defeat of Chaos 6, leading to him trying to nuke Station Square ''with himself in it'' -- and even ''that'' was foiled, [[UnderestimatingBadassery by Tails of all people]]. This was another weird dub change; the Japanese original had him acting more desperate and on the edge. This also explains his wild mannerisms in that scene.

* ContinuityReboot: While not initially presented as such, later declarations from SEGA regarding the split between Classic Sonic and Modern Sonic have turned this game into the start of its own continuity.

* ObviousBeta: The game was rushed for its original Japanese release after development for it was halted in order for it to be made for the Dreamcast instead, and was loaded with glitches, forcing Sonic Team to delay the U.S. release by a year to patch it up. Even then, the game still has loads of glitches, so it's very easy to break wide open, most notably in the ''DX'' port, which adds even more glitches than the original Dreamcast game. [[http://www.gamefaqs.com/pc/624155-sonic-adventure-dx-directors-cut-2011/faqs/26151 This page]] gives many examples of them.

[[caption-width-right:350:''[[{{Tagline}} Total CHAOS!]]'']]

[[caption-width-right:350:[[{{Tagline}} Total CHAOS]].]]

[[caption-width-right:350:[[{{Tagline}} The Original Hero]] [[HesBack is Back!]]]]

** Upon biding farewell to Gamma right before the destruction of the Egg Carrier, Amy promises that they will meet again some day. [[spoiler:Later in Super Sonic's story, we can see her accompanied by the Flicky that used to power up Gamma, indicating that they were reunited in a way.]]

''Sonic Adventure'' also a VirtualPet side mode featuring a clan of {{mon}}s called the Chao, based on the A-Life system Sonic Team developed for ''VideoGame/NightsIntoDreams''. Chao can change their appearance and develop their attributes when given small animals collected from defeated robots in the main mode. These stats are put to the test in Chao Races, which pit your Chao against seven others in a race to the finish. This mode exists mostly outside the chronology and story of the main game, though winning the races is required for OneHundredPercentCompletion.

''Sonic Adventure'' also a VirtualPet side mode featuring a clan of {{mon}}s called the Chao, based on the A-Life system Sonic Team developed for ''VideoGame/NightsIntoDreams''. Chao can change their appearance and develop their attributes based when given small animals collected from defeated robots in the main mode. These stats are put to the test in Chao Races, which pit your Chao against seven others in a race to the finish. This mode exists mostly outside the chronology and story of the main game, though winning the races is required for OneHundredPercentCompletion.

''Sonic Adventure'' introduced the Chao Races, featuring a clan of {{mon}}s called the Chao. This mode exists mostly outside the chronology and story of the main game, though winning the races is required for OneHundredPercentCompletion.

''Sonic Adventure'' saw an UpdatedReRelease for UsefulNotes/NintendoGameCube and PC in 2003, dubbed ''Sonic Adventure DX: Director's Cut''. It added special missions and some unlockable games from the UsefulNotes/GameGear library. It later became available for purchase on UsefulNotes/XboxLiveArcade and UsefulNotes/{{PlayStation Network}}, with the ''DX: Director's Cut'' extras [[DownloadableContent sold separately]]. A similar version popped up on UsefulNotes/{{Steam}} roughly six months later and with the ''DX'' version's extra content included. The post-2003 ports are missing the Game Gear spinoffs, unfortunately.

* BigBad: Eggman, of course. [[BigBadWannabe Or so it seems.]] [[spoiler:Chaos ends up being the main antagonist once the last story rolls around, though he's not evil so much as a vengeful TragicMonster.]]