* AlternativeCharacterInterpretation:
** Philemon isn't like the Abrahamic God, being all-powerful compared to Nyarlathotep's Devil. No, Phil and Nyarly are roughly equal in power and Philemon is actually saving us by making "the bet" - because if he didn't push Nyarlathotep into accepting a game with rules, using humans as the pieces, then Nyarlathotep would just lash out first and destroy everything. This way, we get a chance and Philemon gives us the power to keep pushing back. He is still kind of a callous jerk about the damage this does to his chosen champions' lives, though.
*** Philemon is the incarnation of humanity's greatest aspects and potential and gives everyone the Personas and motivation they need to stop Nyarlathotep. Does he do this because he genuinely loves humanity, or because he's [[NotSoDifferent just as prideful as Nyarlathotep and doesn't want to lose his best?]] Are his words of encouragement given because he's benevolent GuardianEntity who wants humanity to flourish, or a ManipulativeBastard who sees humans as pawns to use against Nyarlathotep?
** Given how ''Innocent Sin's'' class and students lavish over Tatsuya repeatedly despite Tatsuya doing nothing to warrant any of it; it's highly possible that Tatsuya's status is because he's the victim of rumors swirling around about him.
* AnticlimaxBoss: If you prepare for the bosses, they'll become this trope. It's also possible to [[spoiler:kill 'em all with Armageddon]].
* AuthorsSavingThrow: The North American version of ''Eternal Punishment'' is a peculiar example, as it reverted the original ''Persona'''s characters back to their canonical Japanese surnames. For sake of continuity, however, the characters' first names were left Anglicized. The localization team tried to compensate for this ContinuitySnarl by retconning some of the bigger translation goofs; For example, the revelation that "Guido Sardenia" is actually an alias for Guido Kandori, the previous game's antagonist. He's still named Guido, due to Nate and co. retaining their western names, so ''Eternal Punishment'' breaks even and just calls him Guido Kandori.
* AwesomeEgo: For most of ''Innocent Sin'' Eikichi Mishina would happily talk about how awesome he is, and most of the fans of the game would agree.
* SugarWiki/AwesomeMusic: Many in both the PSX and PSP [=OSTs=], but the boss battle music and JOKER stand out.
** An interesting case of why this occurred. The original PSP Persona remake remixed if not changed the OST around to their ''P3''/''P4'' counterparts to mixed reactions. Here, Atlus comprised both the PSP and remix version in the game proper in case the remixes weren't to fans' liking. But this time, the remixes were good. DAMN GOOD.
* CommonKnowledge: No, Adolf Hitler is not the FinalBoss of ''Persona 2''. Rather, [[spoiler:he's the first form of the Final Boss of ''Innocent Sin'', and even then, he's just an avatar of Nyarlathotep, the actual Final Boss of both games]].
* CompleteMonster: [[EvilOldFolks Tatsuzuo Sudou]], from ''Eternal Punishment'', is the [[CorruptPolitician Japanese Foreign Minister]] and leader of the New World Order, a cult planning to [[AscendToAHigherPlaneOfExistence reach the world of the Gods]]. Tatsuzuo, however, has more selfish ambitions. Using his own group to conduct crimes, which include framing the father of two of the main characters; unethical experiments resulting in humans turning into monsters; and attempted murder to Baofu, which resulted in his assistant's death, he furthers the ambition of New World Order while hiding it from the public. To that end he also sends his [[AxCrazy insane son Tatsuya Sudou]] to a mental hospital in order to lock him up from the public eye, and when he finds out he escaped sends the Taiwanese Mafia to kill him. Once the New World Order succeeds in their goal in activating a spaceship to use to reach God, this also causes the world outside the spaceship, which is the city they reside in, to be in danger from a natural disaster that can wipe out humanity, something Tatsuzuo is aware of. After reaching this far, Tatsuzuo [[YouHaveOutlivedYourUsefulness betrays his loyal companions]] by mutating or killing them, while sending out demons to take down the heroes.
* GameBreaker: Some of the Fusion Spells are these. Of note is Dashing Strike (Zio + Tackle), which can be obtained as [[DiscOneNuke early]] at level 15 if you get lucky with mutating Minotaur; going off Michel's huge attack stat, it deals massive amounts of damage to multiple enemies ''multiple times'' that can easily carry you throughout the endgame provided the enemy doesn't resist Physical. There's also Armageddon, but it's [[AwesomeButImpractical less practical]] due to needing to be at least level 94 to even invoke the exclusive personae needed to use it.
* GeniusBonus: There's several small bits of trivia, ranging from Aztec mythology to the significance of the names Maya and Maia.
** The publishing company Maya works at, Kismet, is a synonym for "destiny".
*** And, of course, all the Personae (except Tatsunoshin Suou, Maihime Amano, Junnosuke Kuroda, and Alfred/Yamoaka from ''Eternal Punishment'') are from real mythologies.
* HoYay: Jun Kurosu, who ''definitely'' sees Tatsuya Suou as more than a friend. Doubles as ShipTease.
** Parts of the game and [[WordOfGay interviews]] would imply Suou and Kurosu are the intended ''Innocent Sin'' pairing. Specifically scenario designer Satomi Tadashi [[note]]Interestingly enough, he seems to ship both Tatsuya/Maya and Tatsuya/Jun [[/note]] and character designer Kaneko Kazuma.
* LesYay: Yukino and Anna in ''Innocent Sin''. [[spoiler: If you pick the wrong choice to leave Yukino behind at the entrance to Caracol, you encounter Shadow Yukino and Anna instead of the Longinus mechs, at which point Shadow Yukino [[https://www.youtube.com/watch?v=0Nlaazca4Y4#t=76 kisses]] Anna. After the battle, Anna will jump off the bridge in Caracol holding hands with Shadow Yukino, who convinced her to do it so that they would be together forever. If you bring Yukino, she will, after you fight Joker, give her Persona ability to Jun and go off into the city to fight Nazis with Anna, who has promised to look after her now that she doesn't have her Persona anymore]].
* MagnificentBastard: Nyarlathotep, of course. He sets the board up to his advantage, his plans have such style, and his manipulations so meticulous and cunning that [[spoiler: he's the only ''Persona'' god to actually ''win''.]]
* MemeticMutation: Let's positive thinking!
** Tatsuya's talent in SFX-imitating, as lampshaded in the drama CD. Fans took it and ''ran with it''.
* MoralEventHorizon: [[spoiler: Believing and support in the apocalypse started by Nyarlathotep would be bad enough, but Okamura definitely crosses one when she stabs Maya with the spear of Longinus, killing her in ''Innocent Sin''.]]
* {{Narm}}: The voice acting in ''Eternal Punishment''. Leaves much to be desired. "It's self-defense. There's NO problem with that," anyone? Also, Hitler wearing sunglasses in the PSP remake.
** NarmCharm: Nobody can deny this makes the fight even better.
* NeverLiveItDown: Even if Philemon is the personification of human's goodness and tried his best to help the heroes against Nyarlathotep [[GodsHandsAreTied with his hands tied]], good luck finding people who won't consider him a jackass because he made the bet with Nyarlathotep in the first place.
* SignatureScene: The finale of ''Innocent Sin'', particularly the boss fight with Hitler, which is on the level of fighting YHVH in ''VideoGame/ShinMegamiTenseiII'', and to a slightly lesser extent, [[spoiler:Okamura killing Maya, resulting in Nyarlathotep destroying the world and the setup for ''Eternal Punishment'']].
* ThatOneAttack:
** One of the Bolontiku in ''Innocent Sin'' and [[spoiler: Metal Jun ]] in ''Eternal Punishment'' have an attack in their respective games called "Terror Fortune" which deals moderately high [[BlowYouAway Wind]] and [[CastingAShadow Dark damage]] to the entire party, which isn't so bad. The problem is that it [[FromBadToWorse ALSO]] inflicts [[StandardStatusEffects random ailments on your party]], including [[InstantKO instant death]]. Have fun keeping your party alive...
** "Old Maid" in ''Eternal Punishment'' is no fun either. It's a spell that turns one of the character's persona into Joker. When this happens, if you don't immediately abort your battle and defend, it will do some decent damage to the party. What makes this spell a real pain in the ass is that Joker battles tend to have the Joker in question spam the spell repeatedly, dragging the battle out.
* ThatOneSidequest: The cartography (map-making) sidequest in ''Eternal Punishment'' involves a LOT of running around every square inch of a dungeon, probably doing one or two of the dungeon's puzzles (like the Secret Lab's Fuse Box puzzle), walking over all the traps and pitfalls, and generous use of the Estoma spell. It's not fun and it can be draining. And if Salam didn't offer up a King's Ransom for his requests (for an equivalent, think of the rewards on par with [[VideoGame/FinalFantasyIX Chocobo Hot and Cold]]); nobody would willingly do it.
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