* TheAbridgedSeries: ''[[http://whatdoesgodneedwithastarship.com/ A Rope of Robots]]'' is a text based one. As expected, it somehow manages to turn a very serious narrative into a side-splitting mockery.
* {{Expy}}: Elly has an uncanny resemblance to Elle from {{Terranigma}}, both in name and appearance
** Rico is a dead ringer for [[StreetFighter Blanka]]. No one is quite sure why.
** Emeralda is a green-haired orphan [[spoiler:sort of]] child that grows up within the game. Just like [[VideoGame/FinalFantasyIV Rydia]].
** "I am [[strike:[[StarWars Darth Vader]]]] [[strike:[[GGundam Master Asia]]]] [[strike:[[SpellMyNameWithAnS Graf]]]] Grahf, the seeker of power. Doth thou desire the power?"
** Krelian shares his name (in Japanese, they're even spelled the same) and a few personality traits [[spoiler:but not appearance]] with [[ChildhoodsEnd Karellen]].
* HeyItsThatVoice: So very many in the Japanese version.
** Fei is Creator/HikaruMidorikawa. Ironically, he also plays Ramsus, but goes uncredited for that.
** Elly is YumiTouma, the only seiyuu more prolific than Music/MegumiHayashibara. Seriously, just [[http://www.animenewsnetwork.com/encyclopedia/people.php?id=658 check out her credits]].
*** The English voice of Elly is Moira Quirk, best known as the referee from NickelodeonGuts.
** Citan is Creator/HideyukiTanaka, whose roles include [[Franchise/MetalGear Hal "Otacon" Emmerich]].
** Bart is Creator/TomokazuSeki, AKA [[GGundam Domon Kasshu]] and [[LightNovel/FullMetalPanic Sousuke Sagara]] (among many others).
** Billy is Yuji Ueda, who played [[MartianSuccessorNadesico Akito Tenkawa]].
** Krellian is RyotaroOkiayu.
*** Interesting to note is that he's never played the game up until Creator/TomokazuSugita and Creator/YuuichiNakamura presented it to him in [[LetsPlay Tokyo Encounter.]]
* MemeticMutation: "Remember, kids...Chu-Chu died for your sins!"
** "Did you just see my MAD SKILLZ?"
* NamesTheSame: Chu-Chu shares her name with an animal friend from ''[[{{Kirby}} Kirby's Dream Land 3]]''.
** Wiseman shares his name with an antagonist in ''[[BatenKaitos Baten Kaitos Origins]]''.
* UrbanLegendOfZelda:
** A few of them, the two most prominant are that you can somehow use Elly/Sophia's [=OmniGear=] El Regerus outside of the one scripted battle it appears in, and that you can recruit Ramsus as a playable character after [[spoiler:Elly merges with Deus]].
*** These two originate from translated production notes in the ''Perfect Works'' books, outlining plans for El Regerus, Ramsus, and even Margie to be fully playable characters, only to have them get cut down to NPC status thanks to time and funding shortfalls.
** Hilariously, you really can get the El-Regrs (Elly's Omnigear) by entering the final floor of the last dungeon and then going back out, but since its pilot is no longer in your party, it is useless. It's also playable in the Kislev battling minigame, but who enjoys grinding that?
** For extra fun, it's possible to [[GameShark hack]] El Regerus into the game before Elly takes off, but it doesn't have a model for the overworld, causing a game crash.
** There seems to be a rumor of a planned Xenogears OVA that takes place during the Zeboim era. So far, there's no evidence that such a thing was even planned.
* WhatCouldHaveBeen:
** Imagine Xenogears with a fully fleshed-out disc 2. For that matter, imagine Xenogears and VideoGame/{{Xenosaga}} as parts of a massive six-game epic.
** Margie was originally going to be playable, hence the sketch in ''Perfect Works'' where she has an entire arsenal hidden in her cloak. Better known is the fact that Omnigear versions of Siebzehn and Crescens were designs but never implemented.
** There is a rough sketch of El Seibzehn, Maria's MidSeasonUpgrade, in ''Perfect Works''.
** Kahran was originally planned as a SixthRanger, but this got canned when the budget ran out.
* WorkingTitle: ''Xenogears'' was originally called ''-Project Noah-'', but this was changed during development for unknown reasons. Presumably it's because {{Square}} didn't want the already controversial religious symbolism to extend to the title.
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