* BreakthroughHit: ''Odin Sphere'' was Creator/{{Vanillaware}}'s first hit game outside of Japan.
* RelationshipVoiceActor: Creator/AyakoKawasumi with Creator/TomokazuSeki as Onyx. Hmm, [[VisualNovel/FateStayNight where]] [[Manga/RaveMaster have]] [[Manga/{{Genshiken}} we seen]] [[Manga/NodameCantabile this]] [[VideoGame/GateKeepers relationship]] [[VideoGame/AssassinsCreedBrotherhood before...?]]
** Also, many of the female voice cast will reunite again, in some cases even with ''similar'' roles, in the ''Anime/QueensBlade'' franchise.
* WhatCouldHaveBeen: A recent interview with Kentaro Onishi, a Vanillaware employee and the director of "Odin Sphere: Leifthrasir", reveals that there were multiple add-ons that didn't make it into the final game.
** There was an idea for an online multiplayer minigame called Erion Wars. They didn't have the time and couldn't get George Kamitani's approval.
** There are also apparently a lot of missing story cutscenes such as those detailing King Odin's past. They considered making a separate library with new cutscenes showing these missing events, but time restraints and story consistency meant it wasn't possible.
** Remember how there's a lot of missing story regarding Ingway and some of what he was up to during the events of the main story? They actually considered giving him his own chapter, but it was difficult to angle the story from his point of view and his lack of a Psypher meant that his gameplay wouldn't match up with the main system anyway.
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