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[[quoteright:350:[[VideoGame/ChronoTrigger http://static.tvtropes.org/pmwiki/pub/images/FrogVsMagus_7591.jpg]]]]
[[caption-width-right:350:Come, let us finish this charade!]]

-> '''The {{Black Knight}}''': I won't allow anyone to interfere with our fight.\\
'''Ike''': Agreed. It's better this way. I can focus on you!
-->-- ''VideoGame/FireEmblemRadiantDawn''

In video games where you control [[PlayerParty multiple characters at a time]] (almost always {{RPG}}s), a boss that you have to fight with just one character, usually the lead. Either the other party members are missing or incapacitated somehow, or it's simply [[ThisIsSomethingHesGotToDoHimself something he's got to do himself]]. Often a ClimaxBoss, or an enemy with personal significance to the other duelist.

Usually the boss's stats are lowered to compensate for your reduced fighting strength. The challenge is finding a way to win with limited options available to you.

Sometimes you have to do this [[FisticuffsBoss without your weapons]] as well. At other times, [[DuelingPlayerCharacters the boss is another player character]].

{{Worthy Opponent}}s and {{Blood Knight}}s are the most likely to try this.

Do not confuse with the (deliberately) similar-sounding DualBoss, where you fight two bosses at the same time, and their stats are likely ''not'' lowered. If the DuelBoss is also the FinalBoss, this trope overlaps with InTheEndYouAreOnYourOwn. Does not count if you were alone to begin with.



[[folder: Action Adventure Games ]]

* The last level of ''VideoGame/{{Onimusha}}: Dawn of Dreams'' has each character facing down each of their personal rivals by themselves with their {{Leitmotif}}s playing in the background (save for Jubei, in which case it's a remixed version).
* The [[BonusBoss Whip's Memory]]/[[spoiler:Richter Belmont]] in ''[[VideoGame/CastlevaniaPortraitOfRuin Castlevania: Portrait of Ruin]]'' is fought with Jonathan alone, without his partner Charlotte.
* While most of ''VideoGame/DarkMessiah'' is a partyless game barring a few fights, one boss actively challenges you to a duel. You can follow the conditions of the duel (no magic) and face him on his own, or fight his 4 henchman along with him. Given the boss is already crazy tough (he can survive a finisher), it may be in your best interest.
* The endings of the first three ''Franchise/AssassinsCreed'' games are duels, though in the first case it's more "cut up a number of illusions then chase the guy around the area", the second ends in a fistfight. The third one is a real duel, on top of a castle tower.
** The third one, ''VideoGame/AssassinsCreedBrotherhood'', actually plays with this a bit. You usually have an army of Assassin recruits at your your disposal, but not here. The boss [[FlunkyBoss on the other hand...]]
* ''Videogame/BatmanArkhamOrigins'' has Deathstroke, who fights Batman one-on-one and relies solely on his martial arts skills and equipment.
* ''VideoGame/ShounenKinindenTsumuji'' has Tsumuji against his rival Hayate four times, using their own skills and abilities.
* In ''VideoGame/NoMoreHeroes'', after a slew of boss fights against all manner of miscreants and misanthropes, the TrueFinalBoss of the whole game is [[spoiler:Travis' long-lost Irish brother and Sylvia's husband of ten years, Henry. No gimmicks, no interventions, just two young men with {{Laser Blade}}s, similar fighting styles and a score to settle in a deserted car park.]]


[[folder: Action Games ]]

* Both times you fight against [[spoiler:Solo-Wing Pixy]] in ''[[VideoGame/AceCombatZeroTheBelkanWar Ace Combat Zero]]'', you must do so without your {{wingman}}, because the first time around, [[spoiler:he technically still ''is'' your wingman, betraying you right after a nuke knocks everybody else out of commission]] and the second time, [[spoiler:he kills your new wingman with the first blast]].
* Most boss fights in ''VideoGame/StarWarsEpisodeIIIRevengeOfTheSith'' are one-on-one lightsaber duels between Jedi and Sith.
* Operations 000, 004-A, 004-B and 006-B in ''VideoGame/TheWonderful101''.
** The first Kahkoo-regah of the game (although the player will have to backtrack to get it, so it's not the first accessible one) in the Prologue drops Red into the Kahkoo-regah arena with no teammates, and he's forced to fight a Chew-Dough Goo with his bare hands. [[spoiler:On the other difficulties, this is replaced with a ''Diedough Goo''.]]
** 004-A introduces Vijounne. Blue immediately abandons the team for unknown reasons purely so he can fight her alone. During this fight, however, Blue is given special enhanced abilities including combos, a block move and a dodge move (characters usually only have just a generic attack on their own) to make the fight much more interesting.
** 004-B puts the rest of the team momentarily out of commission as they have to provide support to a broken, underwater tube (or else the facility will flood). Red goes alone and, even though he meets up with Blue, the player will not have access to any abilities that require teammates, namely the Wonder Liner and the Unite Morphs. During this part, Red will have the same enhanced abilities as Blue in the previous chapter, which includes unique blocking and dodging moves akin to Unite Guts and Unite Spring. [[spoiler:Tensions rise between them and Blue decides that if Red wants to get Blue to talk that badly, he'll have to prove it in a fight.]]
** 006-B will put you face to face with [[spoiler:Laambo while under the control of Laurence Nelson, Wonder-Red (Emeritus)]]; subverted here, however, in that you're only expected to do the beginning of the fight one-on-one, and recruit team members as the fight goes on.
* In ''Videogame/MetalGearRisingRevengeance'', the fight against Samuel "Jetstream" Rodrigues plays out like this. Raiden even explicitly orders [[CanineCompanion Blade Wolf]] not to interfere in their fight beforehand. [[spoiler:It's a surprisingly difficult fight, since Raiden's primary method of healing relies on defeating and slicing open {{Mooks}} to get their caches of repair nanopaste.]]


[[folder: Driving Games ]]

* ''VideoGame/RidgeRacer'' is known for having the [[BonusBoss fastest cars]] unlocked by [[DefeatMeansPlayable defeating them]] in one-on-one races after beating the main game.
* ''VideoGame/ModNationRacers'' the Elite Racers, skilled drivers who sometimes challenge you to one-on-one races.


[[folder: Fighting Games ]]

* In ''[[VideoGame/SuperSmashBros Super Smash Bros. Brawl]]'', at the end of "The Glacial Peak" stage, [[Franchise/{{Pokemon}} Lucario]] challenges [[Franchise/{{Kirby}} Meta Knight]] to a fight, reducing the Ice Climbers into mere bystanders. A unique thing about this particular Duel Boss is that you can choose to play as either Meta Knight or Lucario.


[[folder: First Person Shooters ]]

* In ''VideoGame/RainbowSix Vegas 2'' you must battle the game's final boss ([[spoiler:an attack helicopter]]) without the help of your teammates.


[[folder: [=MMORPGs=] ]]

* ''VideoGame/FinalFantasyXI'', the first MMO of the series, emphasizes party play with other people, so it wouldn't have this, right? '''''Wrong.''''' There are several special fights that are nothing but Duel Bosses, the most important of which are the fights that raise the level cap to 75. Any job that came before the ''Treasures of Aht Urhgan'' expansion had you face the [[TheComputerIsACheatingBastard sometimes unfair]] OldMaster Maat. All jobs from ''Aht Urhgan'' onwards had a separate fight against a master of that job.
** You can also take on your Adventuring Fellow in order to raise your [[{{Cap}} level cap]] to 70. There's also the L20 Avatar battles, of course.
** ''VideoGame/FinalFantasyXIV'' has a duel boss fight in one of the storyline quests, though the fight itself is an arranged friendly duel between you and your group's paladin in order to entertain a bunch of a kids that are eager to learn how to be an adventurer. Halfway through the fight, the paladin's black mage friend joins the fight to make the fight as a DualBoss.
* In ''VideoGame/GuildWars'' the player has to fight an enemy called the Doppleganger in order to become ascended. The Doppleganger copies the players skills and abilities, and must be fought alone.
** In the ''Eye of the North'' expansion there is a tournament run by the Norn folk where you duel other famous {{NPC}}s from the different campaigns. Each win advances you to the next round, and all of these fights are essentially duel bosses - especially the final boss, Magni The Bison (who himself is a [[{{ShoutOut}} shout out]] to [[{{StreetFighter}} M. Bison]]), who takes a lot of damage and hits pretty hard, and often requires some [[{{CombatPragmatism}} cheap tactics]] to defeat.
*** Averted when you fight Danika, who brings her two pet Fungal Wallows into the fight, essentially making it three-on-one. Zho is a ranger in the tournament who brings her pet Black Moa into battle with her. Old Mac enters the tournament with his pet devourer, Joe.
** ''Eye of the North'' also has a [[{{NintendoHard}} ridiculously difficult]] one-on-one battle against a griffon that likes to summon various spirits that shut down a wide variety of character builds. Depending on what type of character you play, this fight can either be stupid-easy or stupid-hard.
** Again in ''Eye of the North'', there's a quest involving a rowdy Norn making trouble outside the Eye and challenging all comers. You have to beat him in one-on-one combat to finish the quest.
*** All of the above are partially averted if you happen to play a Ranger with a pet, or a Necromancer who summons minions, a Ritualist who summons spirits, or any other class who can spawn helpers. Though these skills could be considered "attacks" and therefore are usually temporary, except in the Ranger's case.
** In the ''Bonus Mission Pack'', there's a mission where you get to play as Turai Ossa, leading his army through the Battle of Jahai. At the end, you get to relive his famous duel against Palawa Joko.
** If you play as an Assassin and decide to go solo against [[BigBad Shiro]] in the final battle, it can be this. Despite Shiro's overwhelming ability to wipe entire parties, it's entirely possible to win solo with the right build.
* Most bosses in ''VideoGame/AdventureQuestWorlds'' must be fought as a group (though they can also be soloed given the proper class, build and strategy). However, several bosses are meant to be fought one-on-one, including:
** Dogear and the Princess from the storyline intro missions.
** The Orc Trainer boss from Noobshire.
** The opponents that you face in the Dragon Koi Tournament during the Kitsune saga.
** And most recently, [[spoiler:Vordred himself]] during the Doomwood saga.
* ''VideoGame/{{Vindictus}}'' also has several bosses that must be fought solo. Episode 8's Succubus is a good example, as well as [[spoiler:Episode 9's Shakarr, who you fight in full Level 2 Dark Knight or Paladin mode for the entire battle]].


[[folder: Platform Games ]]

* The first two battles against Bowser in ''VideoGame/SuperMario64 [[VideoGameRemake DS]]'' can be fought with anyone (Mario is only required to unlock the Star Door leading to the particular levels where said boss battles are held), though Yoshi can't win them since he can't grab and throw Bowser. However, the final battle (and thus the level before it) is a straight duel boss for Mario; Yoshi, Luigi, and Wario will get stuck in the endless stairs leading to the final stage regardless of whether or not Mario unlocked the top of the staircase (unless you perform a glitch that bypasses it).
--> '''Bowser (to anyone but Mario):''' Grrr...I have lost so many Power Stars. However, Mario is the only one I can call my rival. So GET LOST!
* In ''VideoGame/RatchetDeadlocked'', you spend most missions benefiting from fire support courtesy a pair of robots, who will also do most of the tedious unlocking bits and pieces so you can focus on killing everything in the area with [[MoreDakka machineguns]]. ''Every'' boss fight except Shellshock (whose battle takes place outside of the Battledome) takes these guys away, leaving you fighting solo against an experienced gladiator. Luckily Ratchet has saved at least two galaxies...
* The 2008 ''[[Videogame/PrinceOfPersia2008 Prince of Persia]]'' game has basically every enemy doing this (though technically, you and Elika "gang up" on them). The rest of it is platforming.
* The Wing Fortress Zone and Death Egg Zone of ''VideoGame/SonicTheHedgehog2'' has no Tails to help you, as he was gunned down at the start of Wing Fortress. Wing Fortress is [[SoloSequence a full level]], while Death Egg is two consecutive Duel Bosses.
* The ''Franchise/{{Kirby}}'' series has [[PlayingWithATrope played]] with this on a few occasions. In ''VideoGame/KirbysAdventure'' and its GBA remake, Meta Knight, fought as the boss of Orange Ocean, forces the player to carry the Sword ability for the duration of the fight; this is repeated in ''VideoGame/KirbySuperStar'' and ''Kirby Super Star Ultra'' at the end of Revenge Of Meta Knight, though the player can use another ability if they form a helper with their current ability, grab Sword, discard it, convert their helper back into a helper item, and then inhale it to gain their old ability back. [[BoringButPractical Or they could just wait thirty seconds until Meta Knight gets bored and forgoes the Sword requirement]] [[FridgeBrilliance (you ARE on a falling airship, after all).]] ''VideoGame/KirbyAndTheAmazingMirror'' and ''VideoGame/KirbySqueakSquad'' take things a step further: in both games, Meta Knight and Dark Meta Knight don't try to force the Sword ability on Kirby, but the stars they drop throughout the battle do grant the ability when inhaled. Additionally, a Sword bubble is given in the room before Meta Knight's boss fight in ''Squeak Squad'', but the player isn't required to activate or even grab it.
* In ''VideoGame/{{Astal}}'', Astal is incapacitated in one BossBattle, forcing [[PlatformingPocketPal Bird]] to fight alone.

[[folder: Rail Shooter ]]

* ''VideoGame/StarFoxZero'' has a one-on-one dogfight between Fox and Wolf.


[[folder: Real-Time Strategy ]]

* In ''VideoGame/{{Desperados}}'' you control a rag-tag team of foolhardy guys and gals in pursuit of a notorious bandit El Diablo. Each of the Desperados has unique abilities for you to use in appropriate combination and only the leader can climb walls. At the closure of the pursuit El Diablo so conveniently collapses a lift leading to his lair, so the leader is forced to face the villain alone.
* Subverted about halfway through the original Starcraft game's zerg campaign Tassadar makes it seem like he wants a one on one fight with Infested Kerrigan but the Tassadar that shows up is just an illusion.


[[folder: Role-Playing Games ]]

* Defeating [[CanisMajor Garurumon]] in ''VideoGame/DigimonWorld'' prompts him to [[SoreLoser accuse you of cheating]], as he thinks that having to fight a Digimon backed up by a human is not fair. He asks you to come back the next day to fight him again, but this time, you aren't allowed to use items on your Digimon or even give him commands.
* It's traditional for each game in the ''VideoGame/TalesSeries'' to have at least one DuelBoss. What's notable is that almost every duel is fought between friendly characters who are not fighting out of malice, but rather as a means to resolve some outstanding issue or difference of opinion. There's often the added subtext of the less experienced fighter trying to surpass the more experienced one. They also tend to range from difficult to nearly impossible, but failure usually only results in missed gear and bruised egos rather than a game over.
** ''VideoGame/TalesOfPhantasia'' has Cless fight [[spoiler:Meia]], and, as an optional boss later in the game, [[spoiler:Odin]].
** ''VideoGame/TalesOfDestiny'' has Stahn fight [[spoiler:Dymlos]] ([[spoiler:to unlock the full potential of the Swordians.]])
** ''VideoGame/TalesOfEternia'' has Reid fight [[spoiler:Cless]], though it becomes a DualBoss on harder difficulties with [[spoiler:Arche]] joining in. He can also fight [[spoiler:Valkyrie]] as an optional boss.
** ''VideoGame/TalesOfSymphonia'' has Lloyd fight [[spoiler:Kratos]] ([[spoiler:so that Lloyd can release the seal on Origin, but also to prove himself to Kratos. Likewise, Kratos is also testing his son to see how much he's grown.]]) There are also two optional duels: Sheena against [[spoiler:Kuchinawa]], and Zelos against [[spoiler:Seles]].
*** To say nothing of the fact that you can face [[spoiler:Seles]] twice (one with Zelos, one with anybody) in the Coliseum, which has a set of one-on-one tournaments too. Which means you can get ''two'' Last Fencers (Zelos' strongest weapon).
** ''VideoGame/TalesOfRebirth'' has Veigue facing [[spoiler:Milhaust]].
** ''VideoGame/TalesOfLegendia'' has Senel against [[spoiler:Chloe]], and later, [[spoiler:Moses]].
** ''VideoGame/TalesOfTheAbyss'' has Luke fighting [[spoiler:Asch]] twice ([[spoiler:first due to Luke having a HeroicBSOD over [[TomatoInTheMirror the truth of his existence]] and Asch's [[HairTriggerTemper bad temper]] and the second so they can resolve their identities as original and clone.]])
** ''VideoGame/TalesOfSymphoniaDawnOfTheNewWorld'' has Emil fighting [[spoiler:Ratatosk]] ([[spoiler:to assimilate both his personalities into one, and to prove that Emil has surpassed his original self in strength of personality.]])
** ''VideoGame/TalesOfVesperia'' has two: Yuri against [[spoiler:Flynn]] ([[spoiler:to settle the argument between them over whether Yuri's actions during the game were justified]]) and Yuri against [[spoiler:Estelle]] ([[spoiler:to free her from Alexei's control]]). The UpdatedRerelease also adds in a duel between Yuri and [[spoiler:Don Whitehorse]], which is close to a HopelessBossFight, but not quite.
** ''VideoGame/TalesOfGraces'' has three: Asbel against [[spoiler:Hubert]] ([[spoiler:a HopelessBossFight where Hubert shows how far he's surpassed Asbel]]), Asbel against [[spoiler:Malik]] ([[spoiler:so Asbel can prove to himself that he ''has'' grown as a fighter and as a man]]), Asbel against [[spoiler:Sophie]] ([[spoiler:so the latter can prove to herself that she is capable of fighting a friend, in preparation for her fighting Richard]]), and Asbel against [[spoiler:Hubert again.]]
*** It should be noted that the later three Duel Bosses are completely optional (activated via skit chats), and that losing or winning the battle has no real impact on the story.
*** Tales of Graces F also adds yet another optional Duel Boss in the Future Arc: [[spoiler:Cheria against Pascal. Because the latter refuses to take a bath......]]
** ''VideoGame/TalesOfXillia'' has Jude against [[spoiler:Agria]], [[spoiler:Ivar]], then [[spoiler:Gaius]]. There's also Milla against [[spoiler:Muzet]].
** ''VideoGame/TalesOfXillia2'' has Ludger against his half brother Julius, [[spoiler:both as a test of the former's skills and because the latter knows his death is necessary for the world's survival]]. The game also starts with a battle between Ludger and Julius before the player can do anything else, but it's AllJustADream, and [[HopelessBossFight you can't win, no matter what]].
** ''VideoGame/TalesOfZestiria'' has Sorey against [[spoiler:Heldalf]] after [[spoiler:sacrificing his Seraphim friends and separating himself from Rose]]
** ''VideoGame/TalesOfBerseria'' has Velvet against [[spoiler:Eleanor]] [[spoiler:to force her to join the party since she formed a pact with Laphicet.]]
*** Subverted when it comes to Rokurou against [[spoiler:Shigure]] as the party insists on jumping in during every fight. [[spoiler:He does get his duel against Shigure, but only as a cutscene.]]
* It's starting to look like it would be easier to list the ''Franchise/FinalFantasy'' games that ''don't'' use this trope...
** Cecil fights his dark side in a duel early in ''VideoGame/FinalFantasyIV'', shortly after a HopelessBossFight between Kain and Cecil. In the UpdatedRerelease for the Game Boy Advance, Kain has to fight Lunar Bahamut by himself.
*** Additionally, Edward winds up fighting Sahagin by himself early on in the game.
*** In [[VideoGame/FinalFantasyIVTheAfterYears the sequel]], Rubicante can be optionally fought with Edge alone, giving his fire-absorbing cape as a reward for Edge to wear.
** In ''VideoGame/FinalFantasyV'', Galuf must [[HeroicSacrifice fight]] [=ExDeath=] on his own to free the rest of the party. Notably, [=ExDeath=] nukes Galuf to 0 HP as early as the first turn of the battle, but Galuf continues to fight [[{{Determinator}} without HP]] until [=ExDeath=] submits.
** In ''VideoGame/FinalFantasyVI'':
*** Sabin first appears to interfere into the battle between Vargas and the party, and the two [[FisticuffsBoss duel.]]
*** About halfway through the game features a duel between General Leo and Kefka.
*** There's also the battle between Phunbaba and Terra shortly after you find her in the World of Ruin, but it's a HopelessBossFight and she needs to be rescued.
** In ''VideoGame/FinalFantasyVII'':
*** Barret goes up against his former friend Dyne, who has gone AxCrazy; rather, he says; "[[ThisIsSomethingHesGotToDoHimself Stay the hell out of this, Cloud! This is]] ''[[ThisIsSomethingHesGotToDoHimself my]]'' [[ThisIsSomethingHesGotToDoHimself problem!]]"
*** About four hours earlier, Cloud takes on Rufus and his mutant dog alone, as the rest of the party escapes from the [[DiscOneFinalDungeon Shinra Tower]].
*** In {{Wutai}}, Yuffie takes on the Wutai Pagoda and her father by herself in a test of strength, with her final LimitBreak manual and the Leviathan materia as the rewards.
*** At the end of the game, Cloud fights Sephiroth in an {{Unwinnable}} battle... that is, {{Unwinnable}} for [[SingleStrokeBattle Sephiroth.]]
*** If you enter the battle with Ruby Weapon with all your party members alive, it will force you into this by using [[QuicksandSucks Whirlsand]] to [[DeaderThanDead remove two party members permanently]] (and since he [[AIRoulette gets to pick which party members to remove]], it's ''highly'' recommended you [[InvokedTrope invoke this trope]] by starting with two dead party members).
** In ''VideoGame/FinalFantasyVIII'', the first battle against [[spoiler:Seifer]] is a duel between him and Squall. Practically impossible to lose, though, since his stats are downright pathetic.
** In ''VideoGame/FinalFantasyIX'', Zidane duels Amarant (at that point known only as "Red") as a test of strength; he [[DefeatMeansFriendship joins your party afterwards]]. Earlier, the first Black Waltz and Sealion fight Zidane in a combination of Duel Boss, DualBoss and WakeUpCallBoss.
** In ''VideoGame/FinalFantasyX'', Kimahri has to fight the two Ronso, Yenke and Biran, by himself; much earlier in the plot, Kimahri attacks Tidus, who takes him on alone.
*** Giving the patient player a chance to learn all the Blue Magic abilities they may have missed up to that point if you wait for one of them to use the skill and then cast Lancet on them (which also charges Kimahri's Overdrive fully each time you learn a new ability from on of them). The dialogue implies this may be the point of them challenging him (for all their mocking and derision about his horn, the two jerks just want to see him get stronger).
** ''VideoGame/FinalFantasyX2'' had one sidequest battle where Yuna must fight Rikku and Paine in a one-on-one fight as two separate battles.
** In ''VideoGame/FinalFantasyXIII'', Snow is the only party member to fight his [[SummonMagic Eidolon]] alone. Since his is the Shiva Sisters, the fight is technically both a DuelBoss ''and'' a DualBoss.
** In ''VideoGame/FinalFantasyXV'', Noctis [[spoiler:is forced to confront Ardyn, ''the FinalBoss'', by himself, as the latter takes out Noct's party, claiming that they have no place in "the battle of kings."]]
* One of the boss battles in [[VideoGame/AtelierIris2TheAzothOfDestiny Atelier Iris 2: The Azoth of Destiny]] is your first encounter with [[spoiler:Fee, after saving Max]]. Not really a hard fight, if you had full health at the beginning of it because [[spoiler:she]] attacks first and she has extremely high speed stat.
** Also another one is you fighting alone against [[spoiler:Chaos]] due to the rest of your party [[spoiler:celebrating your victory against the Empire]].
* ''VideoGame/BatenKaitos'':
** There's two in the first one as well; as Xelha, you have to face [[spoiler:Xelha's mother, the Ice Queen, in order to gain the Ocean Mirror.]] As Mizuti, you have to fight [[spoiler:the Magician's Shadow]] to finish Mizuti's sidquest. In both cases, the game uses an ''even more'' unorthodox fight system; instead of picking your Magnus cards to fight, you are presented with a handful of face down cards, and one face-up card. You have to find the card that matches the face-up card among the one's face down in order to advance to the next round. If you get the wrong one, you take damage. Obviously, this is a LuckBasedMission. What makes it more egregious is that there is a [[FirstPersonSnapshooter Camera Magnus]] in there, and of course, [[PermanentlyMissableContent you only have this chance to take a photo of the Boss.]]
** The DiscOneFinalBoss of ''VideoGame/BatenKaitosOrigins'' initially knocks the companions of the main character, Sagi, out of the fight, and Sagi must fight him alone until they recover and rejoin him.
* There's one on Rannoch in ''VideoGame/MassEffect3'', where you have to help [[CrowningMomentOfAwesome destroy a Reaper by targeting its weak points while]] ''[[CrowningMomentOfAwesome on foot]]'', but strangely, your squadmates are nowhere to be seen until you deal the final blow, at which point one disappears completely and the other, Tali, shows up behind you - as does Legion, who was nowhere near you at the time.
* Most of the chapters in ''[[VideoGame/LiveALive Live-A-Live]]'' have this somewhere. Masaru's chapter is one slog of duel bosses, Sunset has one at the beginning and at the end (if you let your rival live), Oboro's final boss can be one if you do not pick up the optional two allies in his chapter. Lastly Akira (or rather, Buriki Daioh), Cube, Sammo/Lei/Yuan and Orsted all have their final bosses as this.
** And then there's the best ending of the game itself, which is [[spoiler:every hero facing against each of their own final bosses in pathetically easy duels to represent how powerful they have truly become.]]
* In ''VideoGame/ChronoTrigger'', if you choose to fight Magus in his second appearance with Frog in your party, Frog will send the other party members away for the fight because he wants to defeat Magus himself. In addition, Robo vs. Atropos, during the Geno Dome {{sidequest}}.
* Once you've depleted half of Jonathan Jones's HP in ''VideoGame/SuperMarioRPG: Legend of the Seven Stars'', Johnny [[TurnsRed powers up]] and challenges Mario to one-on-one combat, which cannot be declined. Unless Mario is overlevelled and/or has a crapton of healing items, he is going to die. An easy trick to avoid this duel is to not defeat all of Johnny's [[FlunkyBoss flunkies]].
** Later, Dodo briefly forces your second character into a one-on-one during the fight with Valentina.
* In ''VideoGame/SuperPaperMario'', the final chapter's bosses are all this for every single character, who also conveniently is incapacitated after the boss along WITH the said boss. [[spoiler:Except for Count Bleck.]]
** [[spoiler:Even with Count Bleck, Mario is the only one to initially fight him. However, after jumping on him a few times, everybody else enters the room and joins you, at which point you switch to ''[[GameBreaker Luigi]]''.]]
** And of course, there's the battle with Bowser in the Bitlands, during which Peach is separated from Mario (who must fight him).
* ''Franchise/KingdomHearts'':
** This happens to Sora repeatedly in ''VideoGame/KingdomHeartsI'': first against [[spoiler:Riku]], then the [[RuleOfThree third]] Darkside fight, and then two rounds with [[FinalBoss Ansem]]. He also has optional one-on-ones with Hercules, the Ice Titan and Sephiroth (oh, and all the Olympus tournaments have a solo mode). Donald and Goofy even [[LampshadeHanging call him out]] for deciding to go one-on-one with Hercules.
** There are still more of these in ''VideoGame/KingdomHeartsII'': Luxord, [[spoiler:Xemnas' first phase]], Hercules and Sephiroth again, and [[spoiler:Roxas]] in Final Mix+...
** ''358/2 Days'' has a few, but the most notable are [[spoiler:[[OneWingedAngel Xion]] as the penultimate boss and Riku as the final boss.]]
** It'd be easier to count which bosses ''aren't'' a DuelBoss in ''VideoGame/KingdomHeartsBirthBySleep'', mostly because the characters are alone 90% of the time.
** There's some odd zig-zagging examples in ''VideoGame/KingdomHearts3DDreamDropDistance'' in the form of [[spoiler:Ansem]] and the [[spoiler:Armored Ventus Nightmare.]] The former starts you off solo against him, with your Dream Eater alllies trapped in the darkness below until you reality shift, at which point they can aid you until he destroys the platform you've created. The latter periodically gathers the darkness engulfing the arena [[DarkIsNotEvil (and by extension, your Dream Eaters)]] and weaponizes it, forcing you to go solo during that time.
* Before Yuri can rejoin the party in ''VideoGame/ShadowHearts'', he must defeat the to-this-point ImplacableMan Fox Face in single combat.
** You can [[spoiler:lose this fight without getting a game over]]. This leads to the bad [[spoiler:(and canon)]] ending.
* ''VideoGame/{{MOTHER}}''
** In ''VideoGame/{{MOTHER|1}}'', when you get to Ellay and perform a show in a club, Teddy comes onstage when you're done and demands to know who is beating up his gang members. He pulls Ninten into a one on one fight that doesn't last long, which results in him joining your group for awhile.
** In ''[[VideoGame/CognitiveDissonance MOTHER: Cognitive Dissoance]]'', everyone in your party gets one of these when they enter their own doors inside [[spoiler:Giegue's]] mind, each talking about how their counterpart forced them into being.
** ''VideoGame/EarthBound'': Ness must face an entire world in his own mind (and thus by himself), including the requisite DuelBoss, before the shift to the endgame; said DuelBoss is [[BattleInTheCentreOfTheMind the embodiment of the dark side of his mind]]. You don't even get help from the Flying Men (though it's impressive if you get any of them to survive long enough to accompany you to the boss point), as he collapses on the very first turn if he even survives to that point.
** ''VideoGame/{{MOTHER 3}}'' ends with a DuelBoss battle between Lucas and [[spoiler:the Masked Man]], who has blasted down the rest of his party with a powerful lightning strike, Lucas being protected from it by his Franklin Badge. While Lucas CAN use [[HealingHands healing PSI]] to revive everyone, this just provokes the enemy to ''immediately'' respond with the same lightning attack and strike them down before they can even make a move. When Flint tries to interfere about halfway through, he too gets taken down brutally.
* ''KnightsOfTheOldRepublic'': Darth Malak pops up and promptly freezes your party members using the Force, then tries to cut you to pieces... twice. Stats lowered, of course: by that point the main character is strong enough that after a Force buff or two it's trivially easy to hurt Malak enough to force him to retreat... which [[GameplayAndStorySegregation does nothing to prevent]] [[spoiler:one of your party members making a HeroicSacrifice to "save" you from the guy you were effortlessly demolishing mere moments ago.]] When you face Malak again at the end of the game, you also fight alone... and this time, he's the most powerful enemy in the entirety of KOTOR. Though this is {{justified|Trope}} because the space station he's on amplifies his Dark Side powers.
** Incidentally, even then he ain't that tough a Sith. All that is needed is liberal use of the Force Choke/Force Wave and a lot of running.
** Juhani and [[spoiler:Bastila]] do this too.
** And the sequel loves this trope as well, making you fight Atris, Darth Sion and [[spoiler:Darth Traya]] alone... which incidentally serves to [[BrokenAesop undercut]] its overall message about [[ThePowerOfFriendship drawing strength from others]].
** Interestingly what the main character of KOTOR II is "drawing" on is the ''Force connections'' of his/her friends, which isn't a good thing, by the way.
* [[PickACard Pick a]] ''VideoGame/{{Suikoden}}'' [[PickACard game. Any]] ''VideoGame/{{Suikoden}}'' [[PickACard game.]] (See also TacticalRockPaperScissors.)
** While these fights are almost always done in the special Duel battle system, ''VideoGame/SuikodenII'' bizarrely has one such fight that uses the regular battle system. Which is designed more for 6-on-6 battles.
* ''Franchise/BreathOfFire''
** ''VideoGame/BreathOfFireII'': In a rare optional example, the penultimate boss, Barubary, challenges your main character to fight him one on one. If you accept it, the main character get healed before the duel. The only reward for doing this is a vague hint about where to find a hidden piece of equipment.
** ''VideoGame/BreathOfFireIII'': Young Ryu versus Garr, who's actually a [[spoiler:dragon hunter who's been plotting to trap and kill Ryu the whole time.]] Win or lose, Ryu supposedly dies but wakes up TwentyMinutesIntoTheFuture, older and stronger.
*** Also, near the end of the game, [[spoiler:Teepo]] forces Ryu to look into his own mind and that of his party members, which is in fact a sort of mini-dungeon which Ryu must navigate alone, including an end-of-dungeon boss battle.
** ''VideoGame/BreathOfFireIV'': Ryu has some opponents that he faces alone. Actually, this trope is played with when you face Ight: it seems like it's a normal boss fight (well, you defeated easily all the others one summoned by Rasso), until you realize two things: first, the classic boss battle music is replaced by one way more ominous and eerie; second, the boss proceeds to OHKO your ''entire'' party during its first turn. Then, as your characters are lying on the ground, defeated, the battle doesn't stop: Ryu will stand up, go berserk, transforms into Kaiser Dragon, and single-handedly destroys the boss in a demonstration of UnstoppableRage (only Nina managed to snap him out of it after, thanks to her CooldownHug). Later, Ryu will face Fou-Lu alone, but it's an HopelessBossFight (coincidentally, the same eerie music that you heard while fighting Ight will play here). As for Fou-Lu himself, pretty much all of his battles are duels, but as a Demi-God way more powerful than Ryu (Ryu begins at level 1 ; Fou-Lu begins at level ''65'' !), [[CurbStompBattle all of these fights are a piece of cake]].
* In ''VideoGame/NeverwinterNights2'' the main character must either fight [[spoiler:Lorne]] alone, or choose a single party member to battle in his place. Light of Heavens, while not a boss, requires you to fight her alone if you want to recruit her for your keep, but nothing stops you from using party members to buff yourself up beforehand.
** Its expansion ''Mask of the Betrayer'' has this when you fight in the Ice Troll Lodge to gain one of the admission to become a member of the berserkers, and in the end [[spoiler:except if you have a lover]].
* Fei gets a lot of these in ''VideoGame/{{Xenogears}}'' [[spoiler:including battles with Bart, Elly, Ramsus, Wiseman, Grahf... even the final battle.]]
* ''VideoGame/GoldenSun'' does this trope ''three'' times by having Isaac fighting warriors at the Colosso in one-on-one fights as a way to prove his strength to Babi. What makes it tricky is having to navigate an obstacle course beforehand so you can reach the goal first and get the better item to use in battle. Luckily, Isaac's allies can use their Psynergy before the contests to make the obstacle course easier.
* ''VideoGame/{{Grandia}}'' has Justin and Mullen clashing in a duel when Mullen demands Justin to prove his will to him.
** And don't forget when [[spoiler:Gadwin]] leaves your party. You get one of the best attacks in the game after beating the boss. By the way, both battles are fought with CrowningMusicOfAwesome.
** There's another one with Baal, in between the above two fights.
* The final battle with [[spoiler:Kitanji as Draco Cantus]] in ''VideoGame/TheWorldEndsWithYou'' is fought by Neku alone... to an extent. His partners can't actively fight, but they ''do'' send him light pucks that increase the amount of damage he deals, and unlike normal light pucks that last only for a single finisher attack before being passed to the other character, these stay active for the duration of the whole battle.
** The DualBoss fight against Uzuki and Kariya is also a ''DuelBoss'' fight because they fight in no way different than the player characters, having a light puck of their own and even ''a [[LimitBreak Fusion Attack]]''. This makes them [[ThatOneBoss Those Two Bosses]] for most people, especially if you're not over leveled.
* ''VideoGame/BeyondDivinity'' ends with a duel against [[spoiler:The Death Knight, your NPC partner/companion throughout the entire game]].
* Almost every ''VideoGame/WildArms'' game has at least one of these in the course of the main storyline (not including each character's individual prologues where they typically go through a dungeon and a boss fight alone):
** ''VideoGame/WildArms1'': Jack vs. Harken and Cecilia vs. Elizabeth; in Alter Code F, [[spoiler:Rudy's optional fight with the Rotting Beast to save Surf Village. Again.]]
** ''VideoGame/WildArms2'': Ashley has a couple of solo fights that coincide with going [[SuperpoweredEvilSide Knight Blazer]] - the first against recurring WA monster Trask, the second against [[spoiler:Caina]] (and as Knight Blazer is pretty much the most powerful party member, they go down ''very'' easily); Tim and Kanon each get a duel against Judecca; Ashley gets one against Vinsfeld at the end of Disc One (not forced into Knight Blazer like the others, but he can certainly do it); three party members of your choice get one against the Kuiper Belt roots in the final BossRush; [[spoiler:and Ashley gets one last one against Lord Blazer, although he uses the ThePowerOfFriendship anyway. [[AndThisIsFor But]] [[CombinedEnergyAttack it's]] [[CrowningMusicOfAwesome still]] [[ThemeMusicPowerUp totally]] [[CrowningMomentOfAwesome awesome.]]]]
** ''VideoGame/WildArms3'' is actually the exception: aside from each character's prologue boss, the party manages to stick together for the most part so that no one ever fights a boss alone.
** ''VideoGame/WildArms4'': Jude vs. Kresnik.
** ''VideoGame/WildArms5'': ''Everyone'' but Avril gets one. Dean fights [[spoiler:Nightburn]], and the remaining four each take on a member of the QuirkyMinibossSquad for [[ItsPersonal their own reasons]].
* The ''Franchise/{{Lunar}}'' games have a few instances of this.
** ''VideoGame/LunarTheSilverStar'' features a {{Dual|Boss}} DuelBoss -- Alex has to fight two Dragon Angels alone in Althena's Tower. The remake ''[[VideoGame/LunarTheSilverStar Silver Star Story Complete]]'' cuts that scenario, but includes a different man-to-man fight between Alex and Tempest when the latter attempts to hang a con man for selling fake medicine.
** In ''[[VideoGame/LunarEternalBlue Eternal Blue Complete]]'', Hiro and Jean face Leo and Lunn (respectively) in solo matches, and the final boss of the Epilogue is also a DuelBoss. The original version subverts this with the Phantom Sentry, who begins his BossBattle by freezing every party member except Hiro, but they recover soon enough.
** In ''[[VideoGame/LunarDragonSong Dragon Song]]'', Jian does this a lot: he has a series of gladiator-style solo fights, takes on the Beast King Zethos alone, and ''tries'' to fight without the rest of the party on several other occasions.
* The last boss battle against [[spoiler:Apocalypse]] in ''VideoGame/{{Silver}}'' has you fight without your friends and everything you own except Falcon and [[spoiler:Nemesis' shield and sword]].
** Two of the "regular" bosses, an ice dragon and TheDragon, who's curiously not a dragon but merely a brute with double [=BFSes,=] incapacitate your comrades, both times appealing to CutscenePowerToTheMax and incapacitating both your comrades with attack that later only damage you and make you fight alone.
* Happens frequently in ''VideoGame/JadeEmpire'', from a duel with your rival, Gao the Lesser, near the start, to fighting the final boss- and [[spoiler:in a way, it's come full circle, as the final boss is Sun Li, your master]].
* In ''VideoGame/PennyArcadeAdventures: Episode 2'', the player character must fight Charles, a wealthy rival of Tycho's, to the death for an apartment. It's a purposely AnticlimaxBoss, as you're much more powerful than he is.
* In ''VideoGame/SuperRobotWarsOriginalGeneration 2'', [[MemeticBadass Sanger Zonvolt]] must face [[spoiler:his AlternateUniverse self]] Wodan Ymir in one-on-one, {{BFS}}-on-{{BFS}} combat. The difficulty was amped up in the UpdatedRerelease, ''Original Generations'', due to Wodan's HumongousMecha getting a brand new (and VERY damaging) LimitBreak.
* ''Franchise/DragonAge''
** In ''VideoGame/DragonAgeOrigins'', when you confront [[spoiler:Loghain at the Landsmeet]], regardless of whether you won or not you will end up in a duel with him. [[CombatByChampion You can choose any party member]], apart from your dog, for this, or just do it yourself.
** In ''VideoGame/DragonAgeII'', the Arishok will challenge you to a duel, depending on whether or not he respects you (or if Fenris is in the party). You can deny this challenge, in which case both the rest of your party and the rest of the Qunari in the room have your standard massive brawl.
* In ''[[VideoGame/DotHackGUGames .hack//G.U.]]'' you fight [[spoiler:the real]] Tri-Edge [[spoiler:, Ovan,]] in the end of Reminisce, your partners are incapacitate even before trying to react the BigBad's attacks leaving you alone to face him. Surely it can be seen as a CutscenePowerToTheMax depending of your view and/or skill.
** Any avatar battle also fit in this trope.
* Croix versus [[WellIntentionedExtremist Prince Targana]] in ''VideoGame/ArTonelico2'', of the ThisIsSomethingHesGotToDoHimself type. What makes this battle even more bizarre is the battle system, which allows the Vanguards, like Croix, to defend from attacks only while defending Reivyteils, but since Croix is alone for this fight, he can't defend any attacks and the player is forced to take every blow completely head on. Luckily, Targana's attack power seems to reflect this. To add to it, this boss has to be fought twice back-to-back. The first battle Croix will forcibly not launch any attacks higher than level 2, basically crippling you further, for the second fight, Croix stops holding back and you can go all out.
* In ''VideoGame/{{Persona 3}}'', the player has to fight the secret boss [[spoiler:Elizabeth]] alone. Even if you bring your party members with you before confronting [[spoiler:her]], they won't be able to take part. The same goes for [[spoiler:her brother, Theodore]] in the Portable version.
* In ''VideoGame/NieR'', the player character starts out controlling one character but slowly builds a party of TrueCompanions over the course of the game. In the endgame, he loses all of them and is forced to fight the FinalBoss [[spoiler:and TrueFinalBoss]] by himself. As an additional twist of the knife [[spoiler:the TrueFinalBoss is one of his friends.]]
* In ''VideoGame/AlterAILA'', Blue must have a climactic final duel with [[spoiler:Green]] midway through the story. Depending on the story path, she is either killed or the fight never even occurs.
* Three times in ''VideoGame/SonicChronicles''. Sonic vs General Raxos, Sonic vs Shadow, and Super Sonic vs Emperor Ix.
* On the landmass of Lowee, Neptune and Arfoire square off in ''VideoGame/HyperdimensionNeptunia'' in the event "The Last Battle?!" [[VideoGame/HyperdimensionNeptuniaMk2 The next game]] has a [[ScriptedBattle scripted]] Duel Boss battle in the beginning where Nepgear unleashes the power of the Sharicite on CFW Judge, though it has next to no effect. Later on, Uni insists that she and Nepgear have a one-on-one battle after defeating Linda/Underling at Rebeat Resort.
* Near the end of ''VideoGame/ExitFate'', Daniel and [[spoiler:Leonius]] get into one.
* ''Videogame/TheElderScrollsVSkyrim'':
** Late in the main quest, you must [[spoiler:enter Sovngarde, the WarriorHeaven of [[HornyVikings Nordic]] mythology, alone in pursuit of [[BigBad Alduin]].]] Here, you meet Tsun, the old Nordic god of "trials against adversity" and [[BodyguardingABadass shield-thane]] of [[TopGod Shor]]. He tests warrior spirits for their worthiness to enter Shor's Hall of Valor, and the [[PlayerCharacter Dragonborn]] is no exception. Tsun will need to be defeated in single combat, and he is a tough foe with ContractualBossImmunity to essentially everything but direct damage attacks.
** In the ''Dragonborn'' DLC, the Dragonborn must face Miraak, the EvilCounterpart BigBad of the DLC storyline, alone. You can only fight him by entering a realm of Oblivion which your companions cannot enter.
* Happens twice in ''Videogame/ForumFantasy'' with [[spoiler:Prelich's Madness and the Krazier rematch's second phase.]]
* ''VideoGame/LegendOfLegaia'' and its sequel, ''Duel Saga'' have a few examples.
** In the first game:
*** The fights against the [[PsychoRangers Delilas Family]] consist of three separate and consecutive one-on-one duels, with no chance to rest or save until all three are defeated.
*** Earlier in the game, Gala will fight his [[RivalTurnedEvil rival]] and former friend, Songi, solo. After the fight, he remarks that in the future, the party will have to fight him as a team.
** Despite the title, there are only two instances of this in ''Duel Saga'':
*** Lang has the option to fight the second boss, the Mighty Balken, solo, but can subvert this by fighting with Maya. If you choose the former option, Balken will commend you on your honor.
*** At the end of the InevitableTournament, Lang will have to fight [[spoiler:The BlackKnight Rauss]] in a one-on-one showdown in the arena.
* A rather surprising one at the end of ''VideoGame/TheInfynPrism'', in the Infinity Tower Control room, [[CainAndAbel Greta and Atlese]] come to a head, and duel, 1 on 1, despite both sides arguing against it. In order to progress the story, Greta must kill her older sister.
* ''VideoGame/{{OFF}}'' has a rather peculiar example. If you pick the Judge ending, [[spoiler:you take control of the Judge and fight the Batter, your own PlayerCharacter, without his Add-Ons ([[OneWingedAngel but in a monstrous form]]). Ironically, this fight is even easier than its opposite number (in which you fight The Judge, who has fairly low health, with Batter and all three Add-Ons), because the Judge can inflict Palsy, [[ZeroEffortBoss which stops the boss from doing anything]].]]
* The final boss of ''VideoGame/DarkSouls'' is a one-on-one duel with [[spoiler:Gwyn, Lord of Cinder]], who wield a [[{{BFS}} massive]] flaming sword and nothing else. [[spoiler:Unless you saved Solaire via Chaos Covenant shortcut, he would then assist you instead provided he was alive.]] [[https://eightandahalfbit.files.wordpress.com/2013/10/dark-souls-gwyn.jpg Praise the Sun.]]
* [[spoiler:Gehrman]] of ''VideoGame/{{Bloodborne}}'' is a one-on-one dual with an elderly hunter wielding a SinisterScythe, who urged to MercyKill you, there is [[NoSell no NPC summon for you]] [[note]]You can still summon online co-operaters provided they have triggered the fight but fled instead.[[/note]]. A subversion existed in Chalice Dungeon, [[MirrorBoss Forgotten Madman]] appeared to be this trope at first, but it turns into DualBoss when he reached half health.
* Artea's apprentice in ''VideoGame/LufiaAndTheFortressOfDoom'' demands that the Hero fight him one-on-one before he'll tell the party where to find Artea.
* ''VideoGame/TheLegendOfHeroesTrailsInTheSky'':
** Halfway into ''SC'', Joshua will face Mueller Vander, a LightningBruiser MasterSwordsman. On paper, this trope is averted because you have Josette as a guest character. In practice, she will fall very quickly and will deal ScratchDamage, meaning Joshua may as well be alone.
** In the ''3rd'', Star Door 1 has Julia face Mueller in a friendly duel, though she's given fewer Arts and items to work with than Joshua.
** The second part of Moon Door 1 has Agate face Tita in her Orbal Gear mecha, twice.
** Star Door 5 pits Anelace against [[spoiler:Richard]], who was the penultimate boss of ''FC''.
* ''VideoGame/FarawayStory'' allows Pia to duel her friends (with the exception of Mimi) in order to officially recruit them as party members. [[spoiler:However, defeating Ellevark results in a non-canon ending rather than immediate recruitment. In Chapter 11, Ellevark is the only playable character, which means he has to defeat the chapter boss by himself.]]
* ''VideoGame/ForeverHome'':
** Slash is a HeroAntagonist example who is trying to get the protagonist to evacuate a burning town. Unfortunately, Xero is too mentally broken at the moment to listen to reason, so Slash has to knock him out in a HopelessBossFight.
** Captain Farrell fights Xero one-on-one in the first Aquadome.
** The Guide[[spoiler:, aka a BadFuture version of Xero,]] fights Xero in a BattleInTheCenterOfTheMind.
** The entire Singles Rank portion of the stadium only allows the player to use one character, and some of the rounds feature boss-tier enemies.
** In Burns's character quest, he ends up fighting [[spoiler:Helmer and Cross separately]].
** The third phase of the FinalBoss fight only allows the player to control Xero, who can only end the battle by using his new LimitBreak.


[[folder: Turn-Based Strategy ]]

* Partway through ''VideoGame/FinalFantasyTactics'', Ramza is forced into a solo battle against Wiegraf. After landing the killing blow on him, Wiegraf [[OneWingedAngel transforms into an inhuman]], monstrous being and summons several demons to aid him... whereupon the rest of Ramza's allies show up. (Technically, your troops pull a big damn heroes moment and he summons his guys to 'even the playing field'. Very humorous if you happened to be doing a Solo Ramza Challenge.)
** There's also a fight with a giant gate separating Ramza and Gafgarion from the rest of the party (and the rest of the bad guys). You can open the gate, but it takes a lot of regular move to get up there. As it is, the fight turns into a sort of a one on one happening at the same time as a regular fight; some abilities allow you to circumvent this, however.
** In ''VideoGame/FinalFantasyTacticsA2'', after getting [[spoiler:Frimelda]] to join your party they have a special mission of their own where they fight Ghi Yelgi one-on-one.
*** And before that, Adelle has to win a duel mission to [[spoiler:awaken her dormant Heritor powers]]
** In ''VideoGame/FinalFantasyTacticsAdvance'', there is a chapter where the main character, Marche, is trapped in a room with the BigBad's [[TheDragon Dragon]], Llednar Twem, and must fight him alone. Unfortunately, this is also a HopelessBossFight, and Marche's only options are to run and heal until reinforcements arrive. An alternate trick is available to well-prepared Thieves, as stealing the enemy's entire outfit leaves him very ineffectual (and gives you his outfit, which is quite useful for the point in the story the fight is at). The Damage to MP skill also makes the battle quite trival, because overflow damage doesn't hit HP (and you regain 5 MP a turn).
*** Before that you fight Babus in Exodus' chamber. Exodus is inanimate and helpless. Babus [[BadassBookworm is not.]]
* In ''VideoGame/Disgaea2CursedMemories'' there's a situation where you have to do a HopelessBossFight against Laharl. You CAN win, but it ends up being a non standard game over, so to progress the story you have to lose, which you will likely do anyways because your first play through you're likely, at best, level 60, and Laharl is level 1200. When you lose, you're suddenly given control of [[spoiler:Rozalin]] in a full powered form and are level 2000. This is the only time in the game this happens, and you have no base panel so you can't summon anyone else to aid this character. The battle might as well be scripted, though, as it's nearly impossible to lose to Laharl unless you're deliberately trying because [[spoiler:Rozalin]] [[TookALevelInBadass is suddenly dishing out way more damage than Laharl can even attempt]].
* ''VideoGame/FireEmblemRadiantDawn'' (quoted above) features a twist on this battle: Ike and the BlackKnight fight each other on one half of the battlefield, while everyone else fights on the other half; neither half can interfere with the other. Being a tactical RPG, a simple duel would be short and not require much strategy (such a duel is featured near the end of ''VideoGame/FireEmblemPathOfRadiance'', where it is quite luck based); in fact, the only thing that prevents the player from just killing him in under 2 turns is '''1)''' EXP (being 3 fractions of a chapter away from the end boss, you likely don't need it) and '''2)''' getting the other boss's [[InfinityPlusOneSword Infinity Plus One Lance]].
** This happens again in Chapter 23 of ''VideoGame/FireEmblemAwakening'', and in the same manner to boot. Chrom and the Avatar face off against Validar on the top half of the map, while everyone else fights a bunch of mooks. [[spoiler:After wasting him the first time, the barrier breaks down and it becomes a normal battle from then on out.]] Notably, it's the only level where the Avatar is a RequiredPartyMember.
** Two main paths in ''VideoGame/FireEmblemFates'' also feature a boss like this - in ''Birthright'' Chapter 26, the Avatar needs to defeat [[spoiler:Prince Xander]], and in ''Conquest'' Chapter 25, they must fight [[spoiler:Prince Ryoma]]. In both cases, the Avatar and the boss start in an isolated chamber in the middle of the map, while other units start outside and need to fight regular enemies. However, the player can interrupt the duel in ''Conquest'' version, where after defeating one (on Normal difficulty) or both (on Hard or Lunatic) minibosses ([[spoiler:Ryoma's retainers Saizo and Kagero]], the chamber will open and the other units will be able to swarm the boss, who will angrily {{Lampshade}} the trope:
--->[[spoiler:'''Ryoma''']]: Only an honorless boor would interfere with a duel!
** The [[GameMod ROM hack]] ''VideoGame/ElibianNights'' plays this straight in Karel's tale with his fight against fellow tribesman Kaherdin. Except [[HopelessBossFight you're more than likely going to lose against him.]]
* ''VideoGame/OgreBattle 64'' has Grozz Nuy, the Divine Dragon, whom you must beat if you want to get the Sword of Tiamat and unlock the Dragoon class. You'll face off against him with the leader of whichever unit you sent. He's actually really easy to beat as long as you send someone that gets three attacks per turn.
* One of the final battles in ''VideoGame/VanguardBandits'' has [[TheHero Bastion]] attempt this against [[BigBad Faulkner]]. It's then subverted by [[spoiler:you getting help to deal with him.]]
* In ''VideoGame/LaPucelle Tactics'', Captain Homard has a duel with Demon Lord Veloute, the last of Noir's Demon Lord lieutenants and the one who murdered Homard's parents. It's pretty much Unwinnable...for Veloute since Homard unlocks his Burning Soul super move (which deals ''massive'' damage to demon lords like Veloute) during the fight.
* In the later routes of ''VideoGame/DuelSaviorDestiny'' you're expected to be more proficient at the game than you were at the start, so the game starts throwing these at you. Even if you can't bring your allies, many of the fights where you're alone but the bad guy has minions are actually easier than these because the boss figure has a reduced AI and stats plus the minions are cannon fodder that let you build your combo meter.
* The final mission of the Life campaign in ''VideoGame/HeroesOfMightAndMagic IV'' is a duel between your main hero and the BigBad.
* In the single-player campaign of ''VideoGame/TelepathTactics'', Harriet duels Malcolm alone, since ItsPersonal. This is also a MirrorMatch, since they're both spear-fighters.


!!Non-video game examples:

[[folder: Anime and Manga ]]

* ''Manga/FairyTail''
** After [[TheDragon Bluenote]] [[GravityMaster Stinger]] spends a few chapters kicking several of the main characters around, [[BigBrotherMentor Gildarts]] [[PersonOfMassDestruction Clive]] shows up to take him on. Everyone promptly gets out of his way.
** [[ArcVillain Laxus]] [[PsychoElectro Dreyar]] is a subversion in the Fantasia arc. [[TheHero Natsu]] wants to take him down alone, as he's a BoisterousBruiser with a desire to prove and challenge himself, and Laxus is well known as being absurdly strong. [[spoiler:After [[TheRival Gajeel]] has to pull him out of the way of a fatal attack, Natsu accepts his offer for a [[RivalsTeamUp team up]].]]
* ''Manga/OnePiece'' usually goes this route for the BigBad of the particular arc fighting solo versus Luffy. There are some times where the other heroes fight said Big Bad's lackeys, one on one (two notable examples are Alabasta and Skypiea, where each Straw Hat gets a turn against a different villain).
* ''LightNovel/SwordArtOnline'', Kirito's duel with Heathcliff is essentially this. [[spoiler:The second one also qualifies as InTheEndYouAreOnYourOwn.]]


[[folder: Fan Fic ]]

* ''Fanfic/ThePezDispenserAndTheReignOfTerror'': Calvin [[InvokedTrope invokes]] this trope in Chapter 5, sending the others away so he alone can fight his duplicate.


[[folder: Literature ]]

* Wayne from ''Literature/TheAlloyOfLaw'' is a rare example of a heroic Duel Boss. His favorite tactic in combat is to get close to an opponent, catch them in a [[TimeStandsStill speed bubble]], and fight them one-on-one with his [[CarryABigStick dueling canes]].


[[folder: Live Action TV ]]

* ''Series/GameOfThrones'': Jon and Karl clearly view their confrontation as a private matter between them.
* A rather sadistic subversion occurs in ''Series/MightyMorphinPowerRangers''. In an episode where Trini is learning a new style of Kung-Fu, Rita tries to play with her newfound sense of honor she has been getting, creating a Mantis with the same skills. Eventually, [[HonorBeforeReason it convinces her to fight it alone]], in an even battle. This turns out to be a mistake, because the creature eventually springs an ambush with a squad of Mooks. (It even admits that [[ILied it never believed in the code of honor she did to begin with]].) Fortunately, the other Rangers are close by.


[[folder: Web Comics ]]

* ''Webcomic/{{RPG World}}'' actually implied that Eikre was going to have one of these with [[spoiler:former best friend Jeff]] near the final boss fight.
* The Ocean's Scar fortress from ''Webcomic/DemonFist'' had the "chute sequence", which would drop each member of a group (the Hookshot Pirates, as it turned out) into individual battles with some of Rosenquist's [[AuthorityEqualsAsskicking strongest officers]].