History GameBreaker / ShinMegamiTensei

* Fusion in general can get you some hilarious results in either ''{{Persona 3}}'' or ''[[{{Persona4}} 4]]''. Skill inheritance can get you a persona with all 3 full-party autobuff skills by mid-game. Most encounters won't survive 3 turns of physical attacks if a player uses debuffs as well.

[[folder: Shin Megami Tensei]]
* In ShinMegamiTenseiI the Zio line of skills stun almost everything in the game. With high enough speed, the heroine can immobilize pretty much everything before it even has a chance to move. The Bufu line of spells works just as well, but you need demons for those.

* In ShinMegamiTenseiII, it's damage and defense buffs and debuffs, which stack with themselves and last until they are dispelled, something that not every boss is capable of. But more-so is the Divine Retribution spell. It tears off a quarter of of an enemy's health with an alignment opposite to to the spell's caster, and it works on bosses with no reduction.

* In ShinMegamiTenseiIf, having save data from other Atlus games when you reach the Appraisal Shop in the World of Sloth will get you 18 extra stat points (effectively letting you reach level 117 in a game with a 99 max), increases all of your demons' HP permanently by 25%, gets all of the buff spells on your partner, Sabbatma, and ten somas. That's ten party-wide full-HP and MP healing items, a spell that lets your partner summon demons, and the three most useful spells in the game!
* ShinMegamiTenseiNocturne has its fair share of Breakers too, in many forms. Masakados, for example, nullifies just about every attack on you and increases strength, vitality, magic and agility by 10 (the max on stats in this game is 40). Its abilities are also ridiculously powerful; first is Megidolaon, then a very powerful Expel-type move, and then the ability to reflect all elements and physical moves.

* ''Shin Megami Tensei IV'' brings back Demonee-Ho's ''Desperate Hit''... which is now more useful considering that it can be passed onto your character. Basically, it's an Almighty attack that hits enemies multiple times, but it also has physical attack attributes. Not only does it bypass all weaknesses, but it can also be charged and can get critical hits. Combine with the MP recovery apps and you'll find it hard to use any other skill.

[[folder: Persona]]

[[AC:Persona 2]]

* In ''{{Persona 2}}'', Lucifer and Satan had a spell, "Alpha & Omega" which ''skipped the damage numbers'' and just wipes out the enemy party. Only two bosses in the game actually had some sort of countermove for it. One is an enemy that is immune to all attacks until you remove its barrier, and the other is Philemon, who will reflect the attack on YOU and cause a TotalPartyKill.

[[AC:Persona 3]]

* In ''{{Persona 3}}'', the Lucifer (or Helel in the remakes) persona (in addition to being the most powerful persona on its own, bar none) gives access to "Armageddon", a spell that deals 9999 almighty damage (cannot be blocked or absorbed) to all enemies at 100% accuracy. While it ''will'' kill every non-BonusBoss enemy in the game, Armageddon in itself isn't a GameBreaker, because it costs 100% of your MP to cast. No, what makes it a GameBreaker is that another of Lucifer's abilities, "Victory Cry", replenishes all your HP and MP at the end of each combat. End result: You win everything.

[[AC:Persona 4]]

* Though spell combinations weren't included in ''{{Persona 4}}'', Lucifer makes his return as the notoriously hard-to-fuse but gloriously broken ultimate Persona of the Judgement arcana. He learns ''both'' Victory Cry and Spell Master naturally and tears up Shadows like nobody's business. Even more broken (and even more of a pain to get) is the game's sole Persona of the World arcana, Izanagi-no-Okami. This one starts with Victory Cry as a base skill, and proceeds to learn 4 high-level elemental skills and an amping skill for each one. He is a bit AwesomeButImpractical, because he doesn't inherit any skills, and has no immunities nor any protection from InstaKill Light and Dark spells.

[[folder: Other Shin Megami Tensei]]

* The Null Attack skill from ''DigitalDevilSaga'' nulls ''everything'' except Almighty attacks. This makes you effectively invincible for 90% of the game as only the last two dungeons have random encounters that make use of almighty attacks and none of the storyline bosses (except for the last boss) use almighty as their main form of attack. It won't help you against the bonus bosses though since they just love their powerful unique almighty attacks and the [[spoiler:Demi-Fiend]] will rip you to shreds on his first turn if you dare to have immunities equipped.

[[/folder]]

*** ''Portable'' also introduces Direct Commands. This in itself would not qualify as a Game Breaker, but consider that the [=PS2=] versions do not let you directly control your allies and that [=P3=] was designed with AI-controlled allies in mind. This is especially useful during the DualBoss battle with Chariot and Justice, who must be killed on the same turn or else whoever dies first is fully revived; no more trying to get your AI-controlled partners to not kill one and not the other by accident.

* Lucifer came very close; he had 999 or 99 in all stats, some of the strongest Dark skills, was immune to everything, and had the strongest earth skill. However, he was completely useless against dark demons as he had no light skills, so anything that reflected light would kill his host (always Reiji/Chris). [[hottip:*:Adding a light skill through Tablets would circumvent this problem, however.]] Instead, the real GameBreaker was Abracab; it had the strongest light skills, the strongest healing skill, and the generally brilliant Boss Damage. That's not the best part, however; the real fun was BiStrike, which did damage equal to twice the user's HP. If your level is high enough to summon Abracab, your HP will be so high that nothing will be able to stand up to BiStrike. But you need revive magic, of course, which costs a lot of MP... actually, that's not an issue for two reasons. First, MP cost is calculated by the Persona, not the skill, and skills could be added to a Persona that didn't learn them naturally, meaning you could abuse the system and, in theory, get a Persona with a single-digit MP cost that had ReviveMore. Second, dead characters are revived with 1HP after the battle ends, meaning that all that's needed is healing and, if you're able to summon Abracab, you've probably found enough Spell Cards and got a high enough level that you have something with Elixir All (possibly for a low MP cost, as previously stated) By the way, Abracab himself has Elixir All, and since the dead character will be revived, he or she can then use Elixir All on him or herself, making Abracab 100% ridiculous.

** That's not even scratching the surface of how game breaking this skill change abuse can be. You could get all of the ''Repel [Element]'' skills (including the ever useful ''Repel Phys''), ''Brave Blade'', ''Mediarahan'', ''Spell/Arms Master'', and a dozen other high level skills (all of which would otherwise only be available by the last third of the game) as early as ''April/March''.

* Avians have Flight, which allows the team to teleport to their destination and ignore obstacles, boundaries, and enemy-occupied spaces in distance calculations, ''and'' yields an extra space of movement. This gains a lot of utility in the Belberith battle--normally, you have to use switches to enable a couple elevators so you can reach him, but with an Avian you can simply just fly across the pit without ever touching the switches.

** Hoo boy, Black Frost. Where to start? He's one of two demons (the other being [[spoiler:Dante]]) that can be recruited regardless of your level; outside of NewGamePlus, that is, he has ridiculously high stats, comes with a Ma-Dyne spell, and has no weakness. And his resistances? He absorbs ice, reflects fire and darkness, is immune to light, and takes negligible damage from physical attacks. This means the only attacks effective against him are electricity and force.

* ''ShinMegamiTenseiIMAGINE'' has Erosion Hex, a skill that can hit [[StandardStatusEffects paralyze, poison, amnesia]] and [[TakenForGranite stone]] all at the same time, and has a huge area of effect. When combined with the soulstones of Mothman (+50% Amnesia rate) and Catoblepas (+50% Stone rate), this skill can make everything not immune to mystic/amnesia and death/stone easy targets. It has such low requirements to be learned that nearly every build in the game can incorporate it with minimal effort.

*** Better yet, mix it up with Drain Hit and Pierce. So long as there are no enemies that [[NoSell repel physical attacks]], you can spam it infinitely.

Just because ''Shin Megami Tensei'' is infamous for being [[NintendoHard Atlus Hard]] doesn't mean you can't break it.

*** Also, he has Heat Riser, which is essentially the combination of all three buff spells, and when fused on a certain date, he can also learn Debilitate, which is a combination of all three debuff spells. Combine it with the aforementioned Power Charge and Hassou Tobi and you will have an attack that can defeat even the toughest enemies around, including Death.

** Pretty much every game features a fusion system that can lead to game breakers, but ''VideoGame/DevilSurvivor'' takes it a step further by allowing you to actually choose exactly what you want your demons to inherit.

*** Better yet, mix it up with Drain Hit. The user will be back to full HP after each wave of enemies they slaughter.

** The Multi-Strike skill introduced in ''Overclocked'' is a sterling example. Hits the entire enemy team with up to seven hits each depending on the user's agility. Stick it on a physical specialist with decent agility like Atsuro in or Hinako in the sequel and you'll quickly end up with a one-man/woman wrecking ball capable of completely decimating 95% of the enemy teams in the game.

*** That’s only scratching the surface of the sheer game breaker of pierce and melee in general for true game breaker effect combine deathbound and pierce with ares aid(critical rate up 50%)and phys jump(physical damage up 1.5X) either one cracks up the damage a lot(especially ares aid) but using both allows you to kill most day 7 bosses in one turn if you have full health(you have mediarama for that) even if most demons can only inherent 2 passive skills your psychical based character alone should be enough to wipe out most of the boss health so that a physical demon can finish it off.

* ShinMegamiTenseiI has the Zio line of skills,stun almost everything in the game. With high enough speed, the heroine can immobilize pretty much everything before it even has a chance to move. The Bufu line of spells works just as well, but you need demons for those.

* In ShinMegamiTenseiIf. Having save data from other Atlus games when you reach the Appraisal Shop in the World of Sloth will get you 18 extra stat points(effectively letting you reach level 117 in a game with a 99 max), increases all of your demons' HP permanently by 25%, gets all of the buff spells on your partner, Sabbatma, and ten somas. That's ten party-wide full-HP and MP healing items, a spell that lets your partner summon demons, and the three most useful spells in the game!

** God's Bow and Hell Gaze are basically the same attack, just with different elements (Bow is Expel, Gaze is Death); Either they can block that element, or they die. Simple as that.
** Beelzebub (Fly form) has Death Flies, a skill that has 100% of killing all enemies unless they are immune to Death. If they are immune to Death, they take an amount of damage equivalent do Megidolaon.

** Atropos, when you get her she has Element Boosts, which amp up damage of a specific element by 50% In other words, she is optimal for being a Quad dyne spell user.

*** It is Painfully trivial (though time consuming) to get Null Light on Beelzebub in Persona 4, so the tankage continues!

*** That’s only scratching the surface of the sheer game breaker of pierce and melee in general combine deathbound and pierce with ares aid(critical rate up 50%)and phys jump(physical damage up 1.5X) either one cracks up the damage a lot(especially ares aid) but using both allows you to kill most day 7 bosses in one turn if you have full health(you have mediarama for that) even if most demons can only inherent 2 passive skills your psychical based character should alone should be enough to wipe out most of the boss health so that a physical demon can finish it off.