History Main / InfinityPlusOneSword

* ''Series/KamenRiderExAid'' is video game themed, so naturally this trope ends up being a major plot point. In ''Kamen Rider Chronicle'', the DeadlyGame every BigBad builds their plan around, has the Power of Cronus as this trope, which would take playing the game for ''16 years'' to build up the proper antibodies in order to use without dying, obtaining a Bugvisor Zwei (which, with the game's set up, would require defeating Kamen Rider Poppy, whose stats are around Level 50), and defeating all the Bugster bosses. This is even ''more'' difficult as the average Ride Player starts with stats below Level ''1'' while the weakest Bugster is Level ''10''. It's also necessary to defeat the FinalBoss Gamedeus. The result is being able to become a Kamen Rider with strength eclipsing Level 99 and [[TimeMaster the ability to freeze time.]] Unfortunately, the BigBad [[spoiler:Masamune Dan]] went a SequenceBreaking route and claimed it before any of the heroes, forcing [[spoiler:the BoxedCrook Kuroto Dan]] to create ''another'' one of these to counter him and Gamedeus: the ''Hyper Muteki'' Gashat.
* ''Series/KamenRiderSaber'' is swords and (fantasy) books themed, so in a way, it is inevitable to quite literally contain at least one Infinity + 1 Sword. Indeed, using [[AllYourPowersCombined every Wonder Ride Books and Seiken]] (litt. Holy Swords) that were ever seen in the series (even the ones that were supposed to be movie-exclusive), [[BiblicalMotifs Isaac]] (at this time known as [[TheMaster Master Logos]]) gathers enough power to create the [[TheOmnipotent Omniforce]] book and Caladbolg which led him to transform as Kamen Rider Solomon, rendering him practically invincible to other Riders. However, as [[ImperfectRitual Isaac's ritual]] was interrupted by Touma Kamiyama/Kamen Rider Saber, Solomon's power was in fact incomplete, and the actual crossing of the Holy Swords [[TheGoodGuysAlwaysWin was achieved]] by Touma, leading him to his final form, Kamen Rider Xross Saber.

* The "[[KatanasAreJustBetter Magic Katana]]" weapon and "[[IShallTauntYou Essence of the Brawling God]]" skill in ''[[VideoGame/Yakuza2 Yakuza Kiwami 2]]'', both attained through the Bouncer Missions that Kiryu can take on. The Magic Katana can only be attained by completing the mission "Pandemonium - Legend", which can only be accessed by completing every other Legend-level mission, which ''themselves'' can only be unlocked by completing every Hard and Normal-level mission. "Pandemonium" itself is already a BrutalBonusLevel even in its Normal variant due to the ''[[SequentialBoss three]]'' [[{{Superboss}} Amon battles]] during the mission. The rewards you get for it are very nice - the Magic Katana is an infinite-durability high-power sword that ignites enemies it hits, and the Essence of the Brawling God skill will completely fill your Heat Gauge upon a successful taunt - although in order to even stand a chance in Pandemonium, you will likely had to have already maxed out most, if not all, of your stats and attained most of the other abilities - by the time you finish this, you'll likely be able to stomp the final boss into the ground ten times over.

*** The 3DS version adds an Infinity ''+3'' Sword, the Dragovian King Sword; appropriately you craft it by combining a Dragovian Sword (the +2) with a Liquid Metal Sword. But since the former can only be gotten from an optional boss fight in the postgame and the latter requires some very rare and precious crafting materials, it's more for bragging rights than anything else. Plus it's arguably not even as useful as the Metal King Spear, which you pick up for free in the Dragovian Path on the way to the boss fight that nets you the Dragovian Sword. Spears get the benefit of the Multithrust Spear skill (3 or 4 hits for 50% damage each), whereas swords just get Falcon Slash (2 hits at 75%); not to mention the hero's probably going to be busy casting Omniheal during the postgame fights anyway...

*** The 3DS version adds an Infinity ''+3'' Sword, the Dragovian King Sword; appropriately you craft it by combining a Dragovian Sword (the +2) with a Liquid Metal Sword. But since the former can only be gotten from an optional boss fight in the postgame and the latter requires some very rare and precious crafting materials, it's more for bragging rights than anything else. Plus it's arguably not even as useful as the Metal King Spear, which you pick up for free in the Dragovian Path on the way to the boss fight that nets you the Dragovian Sword. Spears get the benefit of the Multithrust Spear skill (3 or 4 hits for 50% damage each), whereas swords just get Falcon Slash (2 hits at 75%).

*** The 3DS version adds an Infinity ''+3'' Sword, the Dragovian King Sword; appropriately you craft it by combining a Dragovian Sword (the +2) with a Liquid Metal Sword. But since the former can only be gotten from a rather difficult optional boss fight in the postgame and the latter requires some very rare and precious crafting materials, it's more for bragging rights than anything else. Plus it's arguably not even as useful as the Metal King Spear, which you pick up for free in Memories Lane and gets the benefit of the Multithrust Spear skill (3 or 4 hits for 50% damage each), whereas swords just get Falcon Slash (2 hits at 75%).

* ''VideoGame/MetalGearSolid3''[='s Patriot is simple -- just clear the game=]. ''VideoGame/MetalGearSolid4'''s on the other hand ''requires'' a no Alert, no Continues, [[TechnicalPacifist No Kills]] (of humans; tranquilizing an enemy who falls to his or her death counts, but [=GEKKOs=] and Scarabs don't), no recovery item (normal and [[spoiler:iPod]]-assisted natural regeneration is fine), no special item (Stealth Camo or Bandanna), {{Speedrun}} on [[IdiosyncraticDifficultyLevels The Boss Extreme]]... where ''everything'' that's not a "Now Loading" screen (but the "Press Start" prompt ''does'' count!), between-Acts install time (including the "Press Start" prompt), and a post-Act results screen counts towards the 5 hour time limit. Yes, ''even the Start menu and the [=PS3=] home screen''.

*** The 3DS version adds an Infinity ''+3'' Sword, the Dragovian King Sword; appropriately you craft it by combining a Dragovian Sword (the +2) with a Liquid Metal Sword. But since the former can only be gotten from a rather difficult optional boss fight in the postgame and the latter requires some very rare and precious crafting materials, it's more for bragging rights than anything else. Plus it's arguably not even as useful as the Metal King Spear, which you pick up for free in Memories Lane and gets the benefit of the Multithrust Spear skill (3 or 4 hits for 50% damage each), whereas swords just get Falcon Slash (2 hits at 50%).

*** The 3DS version adds an Infinity ''+3'' Sword, the Dragovian King Sword; appropriately you craft it by combining a Dragovian Sword (the +2) with a Liquid Metal Sword. But since the former can only be gotten from a rather difficult optional boss fight in the postgame and the latter requires some very rare and precious crafting materials, it's more for bragging rights than anything else. Plus it's not really that much better than the Metal King Spear, which you pick up for free in Memories Lane (and gets the benefit of the Multithrust Spear skill).

*** The 3DS version adds an Infinity ''+3'' Sword, the Dragovian King Sword; appropriately you craft it by combining a Dragovian Sword (the +2) with a Liquid Metal Sword. But since the former can only be gotten from a rather difficult optional boss fight in the postgame and the latter requires some very rare and precious crafting materials, it's more for bragging rights than anything else. Plus it's not really that much better than the Metal King Spear, which you pick up for free in Memories Lane.

*** The 3DS version adds an Infinity ''+3'' Sword, the Dragovian King Sword; appropriately you craft it by combining a Dragovian Sword (the +2) with a Liquid Metal Sword. But since the former can only be gotten from a rather difficult optional boss fight in the postgame and the latter requires some very rare and precious crafting materials, it's more for bragging rights than anything else. Plus it's not really that much better than the Metal King Spear, which you pick up for free in Memories Lane. It can cast Kazap for free though, which may give it some merit for clearing the postgame dungeons.

*** The 3DS version adds an Infinity ''+2'' Sword, the Dragovian King Sword; appropriately you craft it by combining a Dragovian Sword with a Liquid Metal Sword. But since the former can only be gotten from a rather difficult optional boss fight in the postgame and the latter requires some very rare and precious crafting materials, it's more for bragging rights than anything else. Plus it's not really that much better than the Metal King Spear, which you pick up for free in Memories Lane.

* In ''VideoGame/FZero Maximum Velocity'', there is an Infinity +1 ''car'' that also functioned as an Infinity Minus One as well. To get the Jet Vermillion, you had to A: beat every league (4) on Master difficulty. With the first 9 cars you unlock. You could also do B: race on the Championship Circuit 255 times. That is, all 5 laps, 255 times. You could also take a 3rd option: cheat. Either Gameshark it or use the ingame password system. What makes this an Infinity +/- 1 object is that the car itself is horrible on paper but awesome in practice, because of the one stat not listed in-game: The time it takes to decelerate after a boost runs out. Case in point: it's the car that holds the world records on every course but one, due to its inability to make one jump for a shortcut.

* In ''VideoGame/XenobladeChronicles1'', there's the [[spoiler:Monado III, which is obtained in the final battle]]. It can be carried over into a NewGamePlus, which ends up making multiple cutscenes look rather ridiculous, as they'll play out as though Shulk were using whatever inferior weapon he would normally have at those points, leading to silliness like you hitting a Mechon for massive damage, [[CutsceneIncompetence only for Shulk and/or others to exclaim "It's not working!" in the cutscene that ensues]].

** There is also the Norfleet, a reward for fighting certain Raid Bosses, and can quickly cover an entire battlefield with a metric f--ktonne of elemental damage, the only downside being that you might be in the blast radius...

*** The Valmanway returns yet again and continues to be the single most broken weapon for Soma, an already broken character when maxed out. With the correct soul combination he can use it for what is basically [[GameBreaker health regeneration with every hit and infinitely floating in one place out of many a boss' attack ranges with the correct soul and accessory combinations.]] And the InfinityPlusOneSword gets an infinity plus one version with the Valmanway +1. It makes the game incredibly easy for Soma, but insanely boring for anyone who ends up grouped with a Valmanway Soma. Which is likely, as 80% of players online use him for some stupidly boring reason. [[DualWield Oh, and did we mention you can dual-wield them?]]

* The Spur in ''VideoGame/CaveStory'' (not so much the Sword part as the Infinity Plus One part; it's the most powerful weapon in the game). It's an upgrade to the starting weapon: the Polar Star. To obtain it, you must [[PathOfMostResistance avoid trading it in for a superior weapon until you reach a certain point]]. As for what the Spur does, instead of requiring EXP it's a [[ChargedAttack chargable]] gun: tapping the shot button results in a Level 3 Polar Star, while holding down the shot button fires off a WaveMotionGun, which gets stronger the longer you hold down the button before releasing.

*** The ''boomerang'' is the Infinity Plus One weapon -- it can kill almost anything, ''including the final boss'', in one hit (though the 2019 remake removes that part), and if you still have the magic rooster, one can throw the boomerang and then fly around invulnerable. Although the Magic Rod, a mandatory weapon, is pretty much as good, if not better against certain enemies. Compared to most examples, it's very easy to obtain -- you have to complete a lengthy ChainOfDeals first, but you have to do that to complete the game anyway, and afterward you just have to visit a nondescript cave at the beach where the game started and trade away a less-valuable item. [[AvertedTrope Not so much]] in the Switch remake, where, while still a powerful weapon capable of easily handling a few enemies who are otherwise a pain to deal with, it's nowhere near as insanely powerful as it was in the original.

*** Being the OriginsEpisode of the Master Sword, the game has variants of it as both the InfinityMinusOneSword ([[spoiler:in the form just called the Master Sword]]) and InfinityPlusOneSword ([[spoiler:in the form called the True Master Sword]]). Both of them also count as the SwordOfPlotAdvancement, and must be obtained to progress through the game.

* ''VideoGame/InfinityBlade II'' has an Infinity Plus One ''Ring'' -- the Holy Band gives you a level 10 spell (other spells currently max out at 8) which does irresistible damage and heals you for the same amount. Getting it, however, requires you to possess the Infinity Blade, defeat 4 powerful bosses (two in a row without any rest), and use two treasure maps to locate hidden items; obtaining the ring proves you don't need it to succeed.

* ''VideoGame/{{Nethergate}}'' has Infinity Plus One spells. The Nether Circle spells can only be found in certain dungeons, and to cast them, you must be able to cast the highest-ranked spell of their associated spell circle.

* In the "Story" mode of ''FinalLapTwin'' on the Turbografx 16, you can't buy the best car parts, you have to find them. Once you do, your car becomes the [[InfinityMinusOneSword Infinity Minus One Car]]. Getting all the legendary parts and taking them to a mad scientist gives you the [[InfinityPlusOneSword Infinity Plus One Car]], which hits the top speed without turbo, has almost limitless (and functionally useless) turbo fuel, turns without skidding no matter how fast you're going, and all but flies through the air when it hits a ramp. And the final race in the game is still extremely difficult, because the guy you're racing against ''has the exact same car''.
* In ''VideoGame/FZero Maximum Velocity'', there is an Infinity Plus One ''car'' that also functioned as an Infinity Minus One as well. To get the Jet Vermillion, you had to A: beat every league (4) on Master difficulty. With the first 9 cars you unlock. You could also do B: race on the Championship Circuit 255 times. That is, all 5 laps, 255 times. You could also take a 3rd option: cheat. Either Gameshark it or use the ingame password system. What makes this an Infinity +/- 1 object is that the car itself is horrible on paper but awesome in practice, because of the one stat not listed in-game: The time it takes to decelerate after a boost runs out. Case in point: it's the car that holds the world records on every course but one, due to its inability to make one jump for a shortcut.

** In terms of characters, the Eternals/Guild Wars Characters are among some of the most powerful characters in the game. In order to get one though, you have to fully upgrade an Infinity Plus One Weapon known as the Revenant Weapon. Months of grinding are needed to gather all the materials to gather the weapons, you can only get enough copies for one fully uncapped weapon only once every time the bi-monthly Guild War event comes around, and each Eternal corresponds to a different weapon type, meaning that if you want all ten Eternals, you'll need to fully upgrade at least ten different weapons. And have fun going to through the lengthy process to fully uncap the guild war character.

** The most powerful sword in the game cannot be found in dungeons or on monsters; it has to be created by finding the most powerful sword you ''can'' find in dungeons or on monsters, upgrading it to the maximum level, and then have a blacksmith upgrade it ''again'' to turn it into said sword. That's ''still'' not the best weapon in the game, though. The REAL InfinityPlusOneSword is the result of many dungeon runs and a painstaking amount of ItemCrafting. After getting the sword, you need to acquire every weapon in the game that has a special property and fuse it to the sword with Fusion Pots in order to get what you want. And you ''really'' need to tell the difference between a [[BreakableWeapons normal pickaxe]] and an [[UnbreakableWeapons indestructible pickaxe.]] Since the entire process probably requires you to complete everything in the game, and the use of warehouses means that this can only be used in the main dungeon that you will have already completed, this is also an example of BraggingRightsReward. (And possibly TooAwesomeToUse, unless you're playing the SNES version and have a Dividing pot and two Withdraw scrolls.) But hey, at least you got yourself a sword that has a [[NoSwastikas swastika]] on its hilt and a blade that looks like an impossible energy burst, right?

** According to the game info in ''VideoGame/{{Breath of Fire|I}}'', the hero's best weapons are, in order: Dragon Sword, Emperor's Sword, Tri-Rang. The player will realize during gameplay that the order actually goes: [[InfinityPlusOneSword Tri-Rang]], [[AwesomeButImpractical Emperor's Sword]], [[DiscOneNuke Dragon Sword]]. The Tri-rang is the 2nd strongest of the 3 weapons, but is the second lightest AND hits everyone on the screen. To get it, take Adult Nina (and her Great Bird form) behind a tower at the top of the world map. No level grinding, no epic sidequests, just find the tower, press B, pick up Uber-weapon. Of course, if you didn't read the FAQ, you [[GuideDangIt won't know it's there]].

** Glenn (who happens to be named after Frog's human form) can acquire the legendary holy sword, Einlanzer. This seems to be his InfinityPlusOneSword, until you go to a parallel reality and get ''that'' world's version of Einlanzer -- after which Glenn will use ''[[DualWielding both at once.]]''

** Worth mentioning is that due to the weapon upgrade system of ''VideoGame/DarkCloud'' and its sequel, it's entirely possible to upgrade ''any'' weapon to Infinity Plus One status, except for the starting weapons in the first game.

** Erdrick's Sword, which, while not required to beat the FinalBoss (except in ''VideoGame/DragonQuestI'', where no other weapon will hurt the boss), certainly makes it considerably faster/easier. And of course, there's Erdrick's Infinity Plus One Armor, which not only protects the hero from poison swamps and barriers, but restores his HP with every step. From ''VideoGame/DragonQuestII'' onward, the true Infinity Sword is always capable of extreme damage, but always cursed in some way.

*** The Hero's Infinity Plus One Spear is the Metal King Spear. Since the [[InfinityMinusOneSword Infinity Minus One Spear]], aptly named Hero Spear, [[LifeDrain heals the Hero as it deals damage]], some players continue to use it even after obtaining the Metal King Spear.
*** Yangus' Infinity Plus One Axe is found in a treasure chest only accessible late in the game.
*** Jessica's Infinity Plus One Whip, the Gringham Whip, can only be obtained by grinding for an obscene amount of casino tokens. It can be worth it, as it has significantly better stats than the second-best whip and hits all enemies instead of just a group.
*** Angelo's Infinity Plus One Bow, the Odin Bow, is created by combining three lesser bows: the Eros' Bow, [[InfinityMinusOneSword Cheiron's Bow]], and the Great Bow. It is refreshingly easy to obtain, requiring no grinding or ultra-rare ingredients.

*** It is possible for players to create their very own InfinityPlusOneSword by doing a custom enchantment on a regular weapon. This involves finding the biggest possible type of soul gem and filling it, which practically qualifies as a sidequest in itself and is something only very high-level players, or players who are "clued in" by various quests can accomplish. Then, the player has to either complete a long string of side quests or pay real money for the official "Wizard's Tower" mod, and game money for the appropriate equipment. With all that done, he can finally put a custom enchantment on his weapon. A common choice is both weakness to magic and magical damage enchantments, which is a GameBreaker.

** The incredibly expensive Overgoat and twice-as-expensive relative Ubergoat qualify as Infinity Plus One Companions as their respective +20 and +30 Watchful boosts far outstrip any other Watchful equipment in the game.

*** Also in the Deathclaw Sanctuary is the Infinity Plus One Melee weapon, [[ICallItVera Jack]] [[PunnyName the]] [[ChainsawGood Ripper]]. It hits 30 times per second and has an insane [[CriticalHit crit]] rate, allowing it to chew through Super Mutants like wet paper, but it also breaks down very quickly, making it AwesomeButImpractical and a fully-upgraded and perk-enhanced [[FlamingSword Shishkebab]] [[InfinityMinusOneSword a more sensible option]].

*** The Advance bonus dungeon introduces a new Infinity Plus One Weapon for each character, including the swords Apocalypse and Save the Queen.

** Subverted in ''VideoGame/FinalFantasyIX'', where Steiner's InfinityPlusOneSword is supposedly the Excalibur II. In practice, however, his Ragnarok is the '''real''' InfinityPlusOneSword, since the Excalibur II is more of a BraggingRightsReward than anything else. This is because you can only get the latter sword by going go from the start of the game to a point roughly halfway through the final dungeon and search in a specific area, ''in less than 12 hours''. In a game that spans '''''four discs'''''. This time limit is infamous for making it almost impossible to get the sword on the EU version due to the game not having been adapted to the European 50Hz refresh rate, which makes it run a bit slower while the timer (which is linked to the PSX clock) runs normally. The only way to still get the sword in those versions is to exploit a bug and open the console's disc hatch whenever a video cutscene starts, which allows you to skip them and saving you ''just'' enough time to get the sword, if you are lucky. Note that to do all this, you will miss out on a huge amount of other content for the game-the Excalibur II really doesn't count as an InfinityPlusOneSword because it is all but ''impossible'' to get if you play the game normally.

** In ''VideoGame/FinalFantasyXIII'', any weapon can be an InfinityPlusOneSword but you have to level it up and use an item that costs '''2 Million Gil''' or farm a certain BossInMookClothing (there is a trick to make this easier) and pray for a drop. Using these weapons gives the AP + 1 ability in the addition to the weapon's normal effects... this is the only way to get this ability. Even though these are the Ultimate Weapons, more upgrades are available. Leveling the sword to maximum power requires an additional 1.6 Million gil, though this is hardly necessary; a fully-leveled team can quickly defeat the final {{Superboss}} using fully-powered Tier 2 or basic Tier 3 (Ultimate) weapons.
** In ''VideoGame/FinalFantasyXIII2'', the Odinblade and Odinbolt are the {{Infinity Plus One Sword}}s... but they only hit full power once you've collected all 160 fragments. Each character also has a special weapon that can't even be purchased until after beating the final boss. Even then, the necessary components require prolonged farming of Yomi, a nasty OptionalBoss that is as tough as anything else that the player will face in the game.

** ''VideoGame/FinalFantasyCrystalChronicles'' had a set of Infinity Plus One equipment for each of the four races. The problem? To get items created, you have to get an item's crafting scroll, and the right materials, and then take them to a blacksmith and have it made. All of the ultimate weapons require a rare drop, sometimes multiples, from the boss of a particular dungeon, and virtually require you to own a Game Boy Advance to know how to get enough points to have a chance of that drop set appearing. This is mitigated by the consolation prize: Even if the item you want doesn't appear, there's still some good loot to be had.

** The best weapon in ''VideoGame/FinalFantasyTactics'' depends on the character class, but you'll be hard-pressed to find someone that thinks there's a better sword than Excalibur. It's the second stronger Knight Sword in the game (second only to the Ragnarok, which you get just before the FinalBoss), and more importantly, has a permanent Haste effect on the wielder, letting them act functionally twice as fast as everyone else. And the best part? You get it for ''nothing'' just by recruiting Cid, who joins with you as part of the story[[note]]Cid is also the Infinity Plus One ''Class'', in that he can use all the skills of the various unique Knight classes (Holy, Dark, etc), making him insanely overpowered, especially if he holds on to the Excalibur[[/note]].

* ''VideoGame/LegendOfLegaia'': In the second game each character has access to a set of Infinity plus one gear gained via forging and the use of items called heavens secrets the most notable and useful is [[TheHero Lang's]] Judgment Day a weapon that gives you 220 str and 50 int but most importantly can inflict petrification on enemies and as it happens there is one status effect that can be inflicted on the final boss.

** Lufia 2 has the Infinite Plus One Ring in the form of the Egg Ring, which one gets from defeating the [[OptionalBoss Egg Dragon]]. But how to fight the Egg Dragon? You have to find all the Dragon bal....err.. eggs scattered throughout the world multiple times. After granting your wish several times, he'll fight you instead, and is one of the most vicious bosses in the game if fought legitimately, or can be [[GoodBadBugs killed in one round]]. The Egg Ring grants whomever equips it with maximum stats and will pretty much guarantee that person will NEVER die and always do max damage.

** It has an InfinityPlusOneSword in the Ulti Free Badge. What exactly does this equippable item do you may ask? Gives you an INFINITE supply of attack items, which, considering the massive power of them (up to 999 damage for many, and infinite for others), allows the user to literally flatten the opponent under a barrage of hugely damaging special attacks if they have even just one of the item they want to use. It can also, thanks to this pretty much kill the [[MarathonBoss final boss]] in about ten minutes.

* ''Franchise/MassEffect'' actually makes it quite easy to acquire the {{Infinity Plus One Sword}}s:

*** In ''VideoGame/MassEffect1'', all you need to unlock the Spectre-grade weapons is to acquire more than one million credits. Though there are actually Infinity Plus Two weapons as well which don't appear until your character nears level 50, as there are two tiers of Spectre weapons, and then the Infinity Plus One Bullets and weapon mods... All of which are available at a fraction of their usual price for finishing the [[DownloadableContent Pinnacle Station DLC]]. Good thing, too, as those guns will be needed to not make playing a flurry of perfect decisions or TrialAndErrorGameplay while playing [[IdiosyncraticDifficultyLevels Insanity or Hardcore difficulties]]. Needless to say, starting a new character on those difficulties will be quite rough.

*** The Infinity Plus One weapons ''and'' armor are '''[[BribingYourWayToVictory for sale]]'''; the stuff available from the DownloadableContent packs are better than any of the gear available in the game itself.

** Some of the Giga Chips are possible Infinity Plus Ones. Many of the [=FortePlus/BassPlus/BassAnly=] chips deal far too many hits ''not'' to be used with Attack+ 10's, and you get them from the inevitable fight with him at the end of the BonusDungeon. From [=EXE3=], [=FolderReturn=] cost a fortune in Bug Fragments and [[GameBreaker broke the game into little tiny pieces.]] In ''[[Videogame/MegaManStarForce Star Force]]'', drawing one of the AM-seijin Giga Cards is a fantastic "kill all enemies" button.

** Mewtwo in ''Pokémon Red'', ''Blue'', and ''Yellow'' versions. It had the highest base stat total in the game, and its strongest stat is the Special stat that governed both Attack and Defense for half of the game's types. It was also a Psychic-type, which due to a programming bug was only weak to [[BigCreepyCrawlies one type]] that had weak moves and weak Pokemon that were mostly dual-Poison types, which made them weak to Psychic. It could only be obtained after beating the EliteFour, at the bottom of a treacherous cave filled with high level Pokémon, and then had to be fought while being notoriously difficult to capture. Fortunately, the game's ''other'' InfinityPlusOneSword, the Master Ball, would capture Mewtwo without fail.

* In ''VideoGame/RomancingSaGa'', there is a Special quest reserved for the IneffectualLoner (he is the only one who can hear the spirit of the sword) that involves you actually forging the InfinityPlusOneSword known as the Demonbrand. Also, it starts off as a rusty katana perhaps better suited to cutting food. [[https://www.youtube.com/watch?v=Tu6tWlIz8zk Video]].

** There are a few Infinity Plus One weapons for each weapon class. The best one is probably the Dragon Spear, which has awesome damage and an exclusive waza that also deals a lot of damage. It's also the hardest one to get, as it RandomlyDrops from Dragon Rulers.
** You can get a two for one deal if you are playing as Harid and going for his strongest weapon; the boss guarding the InfinityPlusOneSword is a Dragon Ruler! You can net both Sword and Spear in one go.

** Unfortunately, these weapons are usually only a little better than the next strongest weapons. The real [[InfinityPlusOneSword Infinity Plus One Equipment]] tends to come in the form of accessories like Anne's Cross, a Karin-specific item in Covenant that makes her immune to all status ailments, recovers a small amount of health every turn, and gives a moderate attribute boost.

** But while either of these things might be an InfinityPlusOneSword in any other game, this one is so hard that even both of them together won't make it a cakewalk.
* ''VideoGame/ShinMegamiTenseiI'' has sword fusion, which allows you to fuse certain swords with demons. There were a few nice ones, including one that required you to fuse three elementals to the blade in succession, and one that required a component you could only obtain just before fighting Maou Asura -- i.e. at the very end of the game. The sequel took this even further -- you now had even more combinations and possible swords. At the very end of the tree, you had the sword Hinokagutsuchi, which scored three hits, had amazing accuracy and damage, and turned its targets to ''stone''. To get it, all you had to do was follow a convoluted expert-level fusion process that consumed seven original swords and sixty-seven demons. ''For even more fun'', the sword could be further fusioned to create the Brahmastra, the best gun in the game, or the four pieces of your female companion's ultimate armor. (Which, bad graphics aside, looks downright {{stripperiffic}}.) To sum things up, in order to get the best equipment ever, you need EIGHT [[InfinityPlusOneSword infinity plus one swords]], so you have to bind five hundred and thirty-six demons, and obtain fifty-six baseline fusionable swords. Oh, and did I mention those swords are random drops? Have fun!

** Final Cupil is another example of an Infinity Plus One Weapon. You see, the WhiteMagicianGirl's main weapon is a RidiculouslyCuteCritter that can shapeshift into a weapon. The strength of the weapon it can shapeshift into increases as you feed it these things called chams. In order to get it to its strongest form, you have to find all thirty normal chams, plus all three super chams. One of the super chams requires you to finish a [[ChainOfDeals ridiculously long fetch quest]] in order to get it. The upshot is that the WhiteMagicianGirl goes from having the weakest primary attack in the game to having the... second weakest! Final Cupil is stronger than Aika's ultimate weapon, as it should be considering the difficulty in getting it. Final Cupil can usually do more than 600 damage per hit (never mind that at this point, Vyse's Cutlass Fury might be doing 9999 damage per hit). Though statistically, Final Cupil is stronger than even the above sword for Vyse; it's just that it's not being used by someone meant as a fighter.

* In ''VideoGame/StarOceanTheSecondStory'', the final weapon of the main hero is the "Eternal Sphere", which can only be made through a certain path of upgrades from a unique sword gained from the InevitableTournament. If you sell off that sword after acquiring a better one, unaware of the inherent and entirely unmentioned potential, you can say bye-bye to the InfinityPlusOneSword. The upside? With a bit of luck and a little more SaveScumming, you can aquire the InfinityPlusOneSword as soon as you can leave town.
* You can only get Roddick's (and Ashlay's) best sword in ''VideoGame/StarOceanFirstDeparture'' if you use his [[ItemCrafting Customization]] skill on a sword only available while within a single particular dungeon (when you leave that dungeon, the required sword is taken from you unless you customize it into another). It's a very real possibility that, unless you decided to spend a while mid-game grinding up levels for skill points, Roddick will have barely touched Customization by the time you get to this dungeon. Even then you may have to [[SaveScumming Save Scum]] a bit to make sure you don't botch the customization. Even better? If you don't get Roddick's InfinityPlusOneSword and settle for the second-best available through plot and Customization later on, the second-best sword causes elemental damage that ''heals'' the TrueFinalBoss, just to rub it in a little bit -- and you had to sacrifice the ''real'' second-best weapon for fighting him to make it in the first place! Other characters have an easier time getting their own best weapons if they also learn Customization, as a character can only customize their own weapon type.

** Geno, Mallow, and Bowser's [[InfinityPlusOneSword Infinity Plus One weapons]] are located within three of the six puzzle doors in Bowser's Keep (Bowser's and Geno's are in the Battle doors, while Mallow's is in one of the Action doors). The other Action door contains Peach's [[InfinityMinusOneSword Infinity Minus One weapon]] if you haven't gotten the Frying Pan yet.

** ''VideoGame/TalesOfPhantasia'' has Excalibur, a sword better than the game's purported InfinityPlusOneSword, the Eternal Sword. To get it, you need to visit the secret dungeon below the Morlia Mineshaft (which has the most powerful enemies in the game, TheVeryDefinitelyFinalDungeon notwithstanding). Conveniently, you also get the spear version of this, a weapon you've had once before but had it confiscated, the most powerful offensive magic spell, and the most powerful summon in the game -- four Infinity Plus One Swords for the price of one dungeon.
*** In later games (except for ''VideoGame/TalesOfSymphonia'', [[spoiler:the prequel of ''Phantasia'']]), the Eternal Sword itself was the InfinityPlusOneSword, generally won by defeating Cless, the protagonist of ''Phantasia'', in some kind of arena. He's generally [[GoodIsDumb a lot stronger and faster than he was back then.]] For extra fun, turning the difficulty up adds in either ''Phantasia'''s WhiteMage or witch. (Keep in mind, the WhiteMage can ''stop time''.)
** In ''VideoGame/TalesOfEternia'', the Eternal Sword was only the ultimate weapon in terms of sheer power, sacrificing other stats for it. Not to mention its Time element weakens it against certain enemies. The game had a few other weapons like it too. The true InfinityPlusOneSword was the Last Fencer. While not as strong in terms of sheer strength, it had no element, and the advantage of raising all stats at once. It also may or may not be [[ShoutOut named after one of the titles]] Cless gets in ''VideoGame/TalesOfPhantasia''.

* In ''VideoGame/UltimaVII: The Black Gate'', the game didn't even come with the Infinity Plus One Sword, the Black Sword -- it was added to the game through an expansion pack, ''Forge of Virtue''. As Infinity Plus One Swords go, it ranked right up there, making the rest of the game ridiculously easy -- including such things as Instant Magic Recharge, one-shot kills on ANY creature, etc. It had to be created in the expansion pack, and was useless without the demon who was trapped in the hilt. In the game's sequel, ''VideoGame/UltimaVIIPartII: Serpent Isle'', you wind up having it teleported away from you, and when you find it again, you must release the demon inside in order to escape the dungeon you have been imprisoned in.

* ''VideoGame/ValkyrieProfile2Silmeria'' has an InfinityPlusOneSword that epitomizes the "so hard to get that it becomes useless" issue. Getting the "Angel Slayer" requires completing the bonus dungeon ten times, each time being harder then the last. The only challenge higher than a tenth playthrough of the bonus dungeon is to start a new game on a higher difficulty -- and you lose the sword when you do that. It does possibly help you fight the [[KillerRabbit Hamsters]].

** A legendary ARMOR with all the trappings of an infinity plus one sword, such as a famous wielder/wearer, it must be reassembled from various fragments, an explict quest is required to gain it and it was crafted by Gnomes.
** It's possible to get two Infinity Plus One steel swords, which are still practical because oils with different effects can be applied to each and the player can switch between them. It's also possible to get Infinity Plus One silver swords, but only one can be kept and there's only one optimal oil for silver anyway.

* ''VideoGame/{{Ys}}'': In some games, particularly in the first Book if ''Ys Book I and II'', and ''Ys IV: Mask Of The Sun'', the Infinity Plus One equipment doesn't work against the FinalBoss, so you have to switch to [[PenultimateWeapon a certain lower level set of equipment]]. For example, in ''Ys I: Ancient Ys Vanished -- Omen'' has the Flame Sword, Battle Shield, and Battle Armor, all of which are the Infinity +1 versions of their respective equipment type, and all of which are found in the VeryDefinitelyFinalDungeon which takes up roughly half the game world's geography. However, it's impossible to beat the game without the Silver equipment (Silver Sword, Shield, and Armor) equipped. Or at least the Silver Sword, since no other weapon will even scratch the final boss.

* The [[VideoGame/HarvestMoonBackToNature Mineral Town]] and [[VideoGame/HarvestMoonDS DS]] flavors of the ''VideoGame/HarvestMoon'' series gives you Infinity Plus One ''Tools'' in the form of the Mythic tools. It takes effort to get all six: you have to level up your regular tools to full, then find the cursed tools via mining, ''then'' lift the curse on each one, turning them into Blessed Tools, ''AND THEN'' you have to pair them with [[{{Unobtanium}} Mythic Stones]] and a boatload of gold to the local blacksmith (Saibara or Gray, depending on the game) to gain the Mythic [=Hammer/Axe/Watering Can/Sickle/Hoe/Fishing Pole=]. Made harder in DS by the fact that you can't [[SaveScumming save scum]] the mines until you have six Mythic Stones -- you can only posess one of them at a time. Although a few are more powerful than they're worth: A fully charged Hammer will destroy every poundable object on screen... including your fencing. Ditto the Axe (in DS) and your fruit trees.

** Both ''VideoGame/AssassinsCreedII'' and ''VideoGame/AssassinsCreedBrotherhood'' have the Sword of Altaïr, the games' only "primary" weapon with maxed-out stats. (''[=AC2=]''[='=]s Papal Staff requires [[GameBreakingBug poisoning]] [[spoiler:the Pope]], [[{{Unwinnable}} preventing you from clearing the story]]). In ''II'' it is automatically unlocked when you clear Sequence 8 (about two-thirds through the story, or four-sevenths with the [=DLC=]), but can only be bought at the Monteriggioni blacksmith and is the game's most expensive weapon at 50,000 florins. In ''Brotherhood'' it's [[ATasteOfPower only usable during the first Core Memory]] (story mission), but if you complete all of the Assassins Guild challenges it's unlocked at the Tiber Island Hideout and does not need to be bought. Story-wise it can be unlocked about halfway through the game after recruiting one's first two Assassins, but completing the challenges may require grinding (mainly for Arrow Storms and signaling Apprentices ''during'' combat). The Armor of Altaïr was ''[=II=]''[='=]s Infinity Plus One Armor, granting as much Health as a complete Missaglias armor set but unbreakable, and only unlocked by clearing the six Assassin Tombs, which were mainly platforming missions.

* The first ''VideoGame/FatalFrame1'' game has an InfinityPlusOneSword in the form of a camera upgrade. If you photograph every ghost in the entire game, which at best can be completed early through a second playthrough, the Zero function makes the game ridiculously easy -- rather than have to spend time charging each shot, your camera stays at full charge all the time. It's basically the equivalent of upgrading from a flintlock rifle to a minigun. Oddly, this isn't the hardest upgrade to get; the reward from getting perfect scores in battle mode is much more challenging and virtually useless, since you're limited to equipping only one upgrade at a time.

* In ''VideoGame/ResidentEvilTheDarksideChronicles'', the Linear Launcher fulfills this trope in terms of power, but is much easier to get then the average InfinityPlusOneSword. All you need to do is beat every level on Hard difficulty (admittedly, the Operation: Javier 4/6, which are full of tough enemies, including a number of {{Demonic Spider}}s, and end with ThatOneBoss, with you taking roughly 1.5 damage in 4 and double damage in 6, aren't exactly cakewalks), and your reward is a weapon with S rank Attack and Stopping Power (both of which can be raised to [[RankInflation S+ ]], the best rank in the game, for 22000 gold each), a massive splash radius, and infinite ammo. It does need to charge between each shot, but once you've upgraded that to its maximum, it's roughly 2 seconds between shots that can wipe out any non-boss enemy on the screen.

** A set of infinity plus one equipment: The Sequence Sword, the Peytral armour, the Sapere Aude Rod and the Acacia Hat. Each of them were capable of growing by one point in their main stat every time a certain repeatable quest is completed. These quests didn't occur very often, however it was also possible to do two-player co-operative missions that also awarded both players (or just one in the case of hunting missions) with equipment growth.

** Clever use of random dungeons, bottles (an enemy monster type that makes it easier to acquire items you summon your phantoms into), titles, and a number of otherwise "useless" job classes means that you can do this with any weapon you hold, and you can deck your entire party out with their own DiscOneNuke if you so choose. And since ''Phantom Brave'' has a WeaponsKitchenSink, this means that you can make yourself an Infinity Plus One Sword...or Book...or Loaf...or even Fish.

*** Usually, Mazinkaiser and Shin Getter are the strongest things you'll get, and you don't have to do anything for them. (Except in ''@ Gaiden'' for Getter but it's very easy, which makes its [[GlassCannon disappointing]] [[AwesomeButImpractical stats]] even more annoying considering you get something like [[GameBreaker Mazinkaiser]] alongside it). You pretty much start the game with tons of Infinity Plus One Swords in hand. Of course, they need upgrades as you go along.

* In the "Waking the Dragons" arc of ''Anime/YuGiOh'', Yugi faces Divine Serpent Geh, a snake that has infinite attack, in a duel where both he and his opponent have 0 life points (yes, it's weird). He loops the attack of two knights making them have infinite attack, then combines them, to make one knight with an InfinityPlusOneSword. Literally.

''The Prisoners of Time'' and the infamous Chaos Master deserves special mention. (The other foe where the Sommerswerd is a handicap is Zakhan Kimah, but there are ways around this.) As mentioned before, the Chaos Master will be a lot stronger if you fight him with the Sommerswerd than if you don't have it and are able to obtain the Ironheart Broadsword. The problem is that if you ''don't'' have the Sommerswerd (you can't keep the IB), the LAST battle, a doubleheader against the condemned Sommlenders and Vonotar, will be nearly impossible to survive. Any way you look at it, 1) a mighty sword of the gods being weak against two enemies out of the dozens you'll face doesn't come close to justifying doing away with it and 2) completing ''The Prisoners of Time'' by ANY means is an Infinity Plus One task regardless of what kind of hardware you have.

[[folder:Fanworks]]

** In ''VideoGame/KingdomHeartsII'', Ultima Weapon can once again be synthesized, this time after acquiring its recipe shortly before acquiring access to TheVeryDefinitelyFinalDungeon. Save the Queen and Save the King can also be synthesized, with their recipes hidden in various worlds during the revisits. Fenrir (defeat [[{{Superboss}} Sephiroth]]) has a higher Strength stat, and Fatal Crest (clear the Goddess of Fate Cup) has a higher Magic stat, than the Ultima Weapon, while being worse in the opposite stat. Save the Queen and Save the King also have + versions that can be synthesized after making the originals once, with different abilities. Which particular weapon is best depends on the individual player.

* ''VideoGame/DragonQuest'':

* Excalibur of ''Manga/SoulEater'' is the most powerful weapon in the world and is also what inspired the creation of [[EquippableAlly Demon Weapons]], and unlike Demon Weapons, which can only be used by someone the weapon can synchronize with, he can be used by anyone. Some of the known abilities he grants his wielder are Heavenly Wings, light speed movement, the ability to slash everything with ''[[StuffBlowingUp gigantic explosions of golden fire]]'', and cutting open dimensional portals. But almost nobody would ever want to wield Excalibur because he is an unlikeable egotistical lunatic.

Compare/Contrast InfinityMinusOneSword (in that it's also powerful, but much easier to get).

* The four Infinity +1 Weapons of ''Videogame/EarthBound'' can be earned as random drops from defeating a certain type of enemy (different for each), with some ItemCrafting required in one case. It's a grind, however: the weapon only has [[RareRandomDrop a 1 in 128 chance of dropping]]. Ness's is actually found after the PointOfNoReturn, and you can't even save with it without backtracking to the beginning of the last area, and can't use it for anything but ''that'' area and the final boss. (He at least has an InfinityMinusOneSword, but that's beside the point.) The Sword of Kings, which is particularly notorious for being {{Permanently Missable|Content}} after beating the boss of the area having the enemy that might drop it, is actually the only weapon which Poo can equip to advantage.

* ''VideoGame/{{Undertale}}'' has the Real Knife, which boost your ATK by a whopping ''99'' -- for comparison, the second-strongest weapon only gives a 15-point boost. It is also absolutely useless, since by the time you get it there are no more random encounters and the one boss it could have feasibly been an advantage against was a long ways back. The only actual boss fight after you get the Real Knife is with a OneHitPointWonder who makes up for it with their insane dodging skills -- you can't hit them once in the entire battle until an opportunity finally presents itself to make a sneak attack. In a normal run you wouldn't get this boss and would instead get two later bosses whom the Real Knife would be really useful on... but in the run you get the Real Knife in, they're essentially killed in cutscenes. It's almost like the game is mocking you for your desire to powergame and get the strongest weapon there is.