* AssPull: Meracle ''just happens'' to have the {{Unobtanium}} necessary for the crew to escape the alternate Earth with no mention or foreshadowing right up until the very moment.
* BrokenBase: Quite a few people were disappointed by this game, for various reasons.
* ContestedSequel: While the gameplay was fine, many players were turned off by the subpar story, uncharismatic characters (with some of them being regarded as TheScrappy, such as Lymle), bad voice acting and bad chara-design. When Star Ocean 5 was announced, a lot of fans were happy, but also wished that 5 would be better than 4.
* EnsembleDarkhorse: Arumat is quite well-liked despite his [[EleventhHourRanger minimal screen time]].
* FanonDiscontinuity: There are some fans who prefer to consider that this game never existed.
* FauxSymbolism: The Grigori have an angel motif going on: They're all named after fallen angels from the book of Enoch (who were also called the Grigori), the energy they emit as they transform takes the shape of an angel, and the transformed Grigori all have wings, or a wing of some kind. The angel motif culminates with the final boss Satanail, the Grigori with the most angelic appearance.
* FollowTheLeader: The primary antagonists are alien [[EldritchAbomination eldritch abominations]] that are named after angels and whose goal is to wipe out all life. The backstory involves an apocalyptic event that severely altered the planet and put the future of the human race in jeopardy, with the powers of the world uniting and taking special measures to ensure humanity's survival. Finally, some of the main characters are "special" youngsters that are specifically chosen to perform a task upon with the fate of humanity rests. [[NeonGenesisEvangelion At least they're not in giant robots.]]
* GameBreaker: Meracle. Her X Claw is extremely powerful, she has the best Blindside in the game, and she can stunlock like nobody's business.
* MemeticMutation: Lymle's infamous VerbalTic "Kai".
* {{Narm}}/NarmCharm: The scene [[spoiler:after the alternate Earth is destroyed, in part, due to Edge's actions]]. The scene is supposed to be extremely sad and depressing, triggering [[spoiler:Edge's HeroicBSOD]], but due to the cheesy voice acting and him generally being a LargeHam, it comes off as unintentionally hilarious.
---> '''Edge''': [[spoiler:*slams both hands on the control panel* Oh yeah? You know how it could've been prevented!? If I hadn't started it in the first place! ''DON'T TRY TO CONSOLE ME, DAMNIT!!'' Who cares if it wasn't our Earth? It doesn't even matter... It's gone, either way... Don't you get it? It's ''all'' gone ''forever''. [[MikeNelsonDestroyerOfWorlds My bad judgement put those people]] [[AccidentalPun over the edge]]! [[ChewingTheScenery The Earth was annihilated! Every last speck! Everything!!]] '''[[ChewingTheScenery EVERYTHING!!]]''' People! Children! Animals! Towns and houses and everything! [[MadnessMantra Everything! Everything! Everything! Everything! EVERYTHING!!]] [[SkywardScream AAAAAAAAAAAAAAHHHHHHHHHHHHHHH!!!]]]]
* TheScrappy:
** You won't find many fans of Sarah and Lymle because some fans are turned away by their voice acting and how Sarah is TooDumbToLive.
** Edge also gets a lot of hate during his... [[LargeHam tantrum]]. See {{Narm}}.
* ThatOneLevel: The Cardianon Mothership. Sure, you get Bachus, but the area is hard to look at, the camera hates you and once you get to the force field area, it becomes a LARGER pain in the ass to navigate through. Add to that several large enemies that can stun lock you, break your bonus board and a general lack of breathing room, it becomes a major slog very quickly.
* UncannyValley: The anime-like faces don't emote well. It's made even more uncomfortable by the fact it makes them all look so young. Lymle takes this to a whole new level, due to her CreepyMonotone.
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