History GameBreaker / CardBattleGame

* The Sevens cards, Rosemon's Lure and Download Digivolve in VideoGame/DigimonDigitalCardBattle, all of which counts as InfinityPlusOneSword.
** Armor evolutions. If your partners have enough experience and good equippable Digi-parts, their Armors can carry you throughout a good portion of the post-game. It's even a viable strategy to make the three partner cards you can get the only Digimon cards in a deck and using nothing but overpowered Option cards to boost them further.

* While many overpowered cards and decks have come and gone in ''VideoGame/{{Shadowverse}}'', perhaps the biggest game-breaking deck of them all would have to be Neutral Blood in ''Wonderland Dreams''. To summarize, the brokenness of Neutral Blood came from massive tempo plays in the first 4 turns followed by drawing their win condition by turn 6. The basic Neutral Blood flowchart goes like this: Play [[https://shadowverse-portal.com/card/105611030 Tove]] on turn 2, a very overstatted 3/3 that couldn't attack until you played a Neutral minion, which was barely a drawback in a Neutral-focused deck. Turn 3 you play any 3-cost Neutral to activate Tove, but the best one would be a [[https://shadowverse-portal.com/card/105011030 Goblin Leader]] for an extra Goblin. You follow that up with [[https://shadowverse-portal.com/card/105041010 Alice, Wonderland Explorer]] to turn those puny 1/2 Goblins into much heftier 2/3s. In case of emergencies, your 4-cost [[https://shadowverse-portal.com/card/105611020 Big Knuckle Bodyguard]] gives you a big body ''with'' removal. All this is to help you not fall behind when you play [[https://shadowverse-portal.com/card/104621020 Baphomet]]'s Enhance effect to draw a follower with 5+ Attack and reduces its cost by 3 for 5 points, so that you can play [[https://shadowverse-portal.com/card/105641020 Spawn of the Abyss]] on turn 6, which can deal as much as 16 damage (8 Attack + 8 direct damage to the leader), '''80%''' of their max health, in a single hit evolved if it hit face. If your opponent doesn't have an immediate answer to your turn 2-4 plays you'd be in big trouble even before Spawn of the Abyss can hit your face, and you'd ''better'' have a Ward to stop it if you even want a small chance to come back late game. What should be noted that ''every'' one of these cards mentions were nerfed after release, all of them before the next expansion hit.

* ''[[https://yugipedia.com/wiki/Yu-Gi-Oh!_Legacy_of_the_Duelist Yu-Gi-Oh! Legacy of the Duelist]]'' and ''[[https://yugipedia.com/wiki/Yu-Gi-Oh!_Legacy_of_the_Duelist:_Link_Evolution Link Evolution]]'': In Single Player matches, '''there is no Forbidden and Limited list''', allowing you to put 3 copies of '''ANY''' card you want. '''FROM THE START'''. Yes, you heard that right. This includes the broken [[https://yugipedia.com/wiki/Zoodiac Zoodiacs]], [[https://yugipedia.com/wiki/Pot_of_Greed Pot Of Greed]], the [[https://yugipedia.com/wiki/Dragon_Ruler Dragon Rulers]], [[https://yugipedia.com/wiki/Magical_Scientist Magical Scientist]] and '''freaking [[https://yugipedia.com/wiki/Exodia EXODIA]]'''.

* ''[[https://yugipedia.com/wiki/Yu-Gi-Oh!_Legacy_of_the_Duelist Yu-Gi-Oh! Legacy of the Duelist]]'' and ''[[https://yugipedia.com/wiki/Yu-Gi-Oh!_Legacy_of_the_Duelist:_Link_Evolution Link Evolution]]'': In Single Player matches, '''there is no Forbidden and Limited list''', allowing you to put 3 copies of '''ANY''' card you want. Yes, you heard that right. This includes the broken [[https://yugipedia.com/wiki/Zoodiac Zoodiacs]], [[https://yugipedia.com/wiki/Pot_of_Greed Pot Of Greed]], the [[https://yugipedia.com/wiki/Dragon_Ruler Dragon Rulers]], [[https://yugipedia.com/wiki/Magical_Scientist Magical Scientist]] and '''freaking [[https://yugipedia.com/wiki/Exodia EXODIA]]'''.

*** [[https://yugipedia.com/wiki/Winning_Formula Winning Formula]] allows you to Special Summon '''any''' Number monster from your Extra Deck, except a Number C monster, if only your opponent controls a monster. So now [[https://yugipedia.com/wiki/Number_81:_Superdreadnought_Rail_Cannon_Super_Dora Superdreadnought Rail Cannon Super Dora]] is easily splashable in any deck that can summon it.

* ''Yu-Gi-Oh! Legacy of the Duelist'' and ''Link Evolution'': In Single Player matches, '''there is no Forbidden and Limited list''', allowing you to put 3 copies of '''ANY''' card you want. Yes, you heard that right. This includes the broken [[https://yugipedia.com/wiki/Zoodiac Zoodiacs]], [[https://yugipedia.com/wiki/Pot_of_Greed Pot Of Greed]], the [[https://yugipedia.com/wiki/Dragon_Ruler Dragon Rulers]], [[https://yugipedia.com/wiki/Magical_Scientist Magical Scientist]] and '''freaking [[https://yugipedia.com/wiki/Exodia EXODIA]]'''.

*** [[https://yugipedia.com/wiki/Creator_of_Hope Creator of Hope]]: At the start of your Draw Phase, if your LP is lower than your opponent's and this card is in the GY because this card in your possession was destroyed by an opponent's card and sent there since your last Draw Phase, you can put '''ANY CARD''' from your deck and place it on top on your deck before conducting your normal draw. How about the aforementioned Afterglow, that instantly OTKs your opponent?

*** [[https://yugipedia.com/wiki/Creator_of_Miracles Creator of Miracles]] targets 1 [[https://yugipedia.com/wiki/Number_C39 Number C39]] monster you control, and lets it attack your opponent directly, and if you have activated the effects of "Creator of Hope" and "Winning Formula" previously this Duel, '''YOU WIN.''' You could just Special Summon [[https://yugipedia.com/wiki/Number_39:_Utopia Number 39]] using Winning Formula then upgrade it to [[https://yugipedia.com/wiki/Number_C39:_Utopia_Ray Utopia Ray]] to easily activate this card's effect, making it the easiest Duel Winner to ever exist in this game.

*** [[https://yugipedia.com/wiki/Creator_of_Miracles Creator of Miracles]] targets 1 [[https://yugipedia.com/wiki/Number_C39 Number C39]] monster you control, and lets it attack your opponent directly, and if you have activated the effects of "Creator of Hope" and "Winning Formula" previously this Duel, YOU WIN. You could just Special Summon [[https://yugipedia.com/wiki/Number_39:_Utopia Number 39]] using Winning Formula then upgrade it to [[https://yugipedia.com/wiki/Number_C39:_Utopia_Ray Utopia Ray]] to easily activate this card's effect, making it the easiest Duel Winner to ever exist in this game.

*** [[https://yugipedia.com/wiki/Winning_Formula Winning Formula]] allows you to Special Summon '''any''' Number monster from your Extra Deck, except a Number C monster. So now [[https://yugipedia.com/wiki/Number_81:_Superdreadnought_Rail_Cannon_Super_Dora Superdreadnought Rail Cannon Super Dora]] is easily splashable in any deck that can summon it.

*** [[https://yugipedia.com/wiki/Creator_of_Hope Creator of Hope]]: At the start of your Draw Phase, if your LP is lower than your opponent's and this card is in the GY because this card in your possession was destroyed by an opponent's card and sent there since your last Draw Phase, you can put '''ANY CARD''' from your deck and place it on top on your deck before conducting your normal draw.

*** [[https://yugipedia.com/wiki/Winning_Formula Winning Formula]] allows you to Special Summon '''any''' Number monster from your Extra Deck, except a Number C monster.

*** [[https://yugipedia.com/wiki/Creator_of_Hope Creator of Hope]]: At the start of your Draw Phase, if your LP is lower than your opponent's and this card is in the GY because this card in your possession was destroyed by an opponent's card and sent there since your last Draw Phase, you can put '''ANY CARD''' from your deck and place it on top on your deck.

*** [[https://yugipedia.com/wiki/Creator_of_Miracles Creator of Miracles]] targets 1 [[https://yugipedia.com/wiki/Number_C39 Number C39]] monster you control, and lets it attack your opponent directly, and if you have activated the effects of "Creator of Hope" and "Winning Formula" previously this Duel, YOU WIN. You could just Special Summon [[https://yugipedia.com/wiki/Number_39:_Utopia Number 39]] using Winning Formula then upgrade it to [[https://yugipedia.com/wiki/Number_C39:_Utopia_Ray Utopia Ray]] to easily activate this card's effect, making it the easiest Duel Winner ever.

** [[https://yugipedia.com/wiki/Creator_of_Hope Creator of Hope]]: At the start of your Draw Phase, if your LP is lower than your opponent's and this card is in the GY because this card in your possession was destroyed by an opponent's card and sent there since your last Draw Phase, you can put '''ANY CARD''' from your deck and place it on top on your deck.
** [[https://yugipedia.com/wiki/Winning_Formula Winning Formula]] allows you to Special Summon '''any''' Number monster from your Extra Deck, except a Number C monster.
** [[https://yugipedia.com/wiki/Creator_of_Miracles Creator of Miracles]] targets 1 [[https://yugipedia.com/wiki/Number_C39 Number C39]] monster you control, and lets it attack your opponent directly, and if you have activated the effects of "Creator of Hope" and "Winning Formula" previously this Duel, YOU WIN. You could just Special Summon [[https://yugipedia.com/wiki/Number_39:_Utopia Number 39]] using Winning Formula then upgrade it to [[https://yugipedia.com/wiki/Number_C39:_Utopia_Ray Utopia Ray]] to easily activate this card's effect, making it the easiest Duel Winner ever.

** [[https://yugipedia.com/wiki/Creator_of_Miracles Creator of Miracles]] targets 1 [[https://yugipedia.com/wiki/Number_C39 Number C39]] monster you control, and lets it attack your opponent directly, and if you have activated the effects of "Creator of Hope" and "Winning Formula" previously this Duel, YOU WIN. You could just Special Summon Number 39 using Winning Formula then upgrade it to C39 to easily activate this card's effect, making it the easiest Duel Winner ever.

** [https://www.youtube.com/watch?v=hsCt7vpoODU&feature=emb_title This speedrun]] is just an example of how this can be abused.

** [[https://www.youtube.com/watch?v=gAab6lHClTs Here]] is just an example of how this can be abused.

* ''Yu-Gi-Oh! Legacy of the Duelist'' and ''Link Evolution'': In Single Player matches, '''there is no Forbidden and Limited list''', allowing you to put 3 copies of '''ANY''' card you want. This includes the broken [[https://yugipedia.com/wiki/Zoodiac Zoodiacs]], [[https://yugipedia.com/wiki/Pot_of_Greed Pot Of Greed]], the [[https://yugipedia.com/wiki/Dragon_Ruler Dragon Rulers]], [[https://yugipedia.com/wiki/Magical_Scientist Magical Scientist]] and '''freaking [[https://yugipedia.com/wiki/Exodia EXODIA]]'''.

* ''Yu-Gi-Oh! Legacy of the Duelist'' and ''Link Evolution'': In Single Player matches, '''there is no Forbidden and Limited list''', allowing you to put 3 copies of '''ANY''' card you want. This includes the broken [[https://yugipedia.com/wiki/Zoodiac Zoodiacs]], [[https://yugipedia.com/wiki/Pot_of_Greed Pot Of Greed]], the [[https://yugipedia.com/wiki/Dragon_Ruler Dragon Rulers]], [[https://yugipedia.com/wiki/Magical_Scientist Magical Scientist]] and '''freaking [[https://yugipedia.com/wiki/Exodia EXODIA]]'''

* ''Yu-Gi-Oh! Legacy of the Duelist'' and ''Link Evolution'': In Single Player matches, '''there is no Forbidden and Limited list''', allowing you to put 3 copies of '''ANY''' card you want. This includes the broken Zoodiacs, Pot Of Greed , the Dragon Rulers and Magical Scientist.

* ''Yu-Gi-Oh! Legacy of the Duelist'' and ''Link Evolution'': In Single Player matches, '''there is no Forbidden and Limited list''', allowing you to put 3 copies of '''ANY''' card you want. This includes the broken Zoodiacs, Pot Of Greed , the Dragon Rulers and Magical Scientist.
** [[https://www.youtube.com/watch?v=gAab6lHClTs Here]] is just an example.

* ''Yu-Gi-Oh! Legacy of the Duelist'' and ''Link Evolution'': Single Player and Unranked Player matches allow for the use of multiple limited and banned cards in the same deck. Having 3 of Pot of Greed, Graceful Charity, Monster Reborn, Solem Judgement and Zoodiacs will make nearly any deck you make powerful enough to chew through the single-player duels like nothing. [[https://www.youtube.com/watch?v=gAab6lHClTs Here]] is an example.

* ''Yu-Gi-Oh! Legacy of the Duelist'' and ''Link Evolution'': Single Player and Unranked Player matches allow for the use of multiple limited and banned cards in the same deck. Having 3 of Pot of Greed, Graceful Charity, Monster Reborn, Solem Judgement and Zoodiacs will make nearly any deck you make powerful enough to chew through the single-player duels like nothing.

* ''Yu-Gi-Oh! Legacy of the Duelist'': Single Player and Unranked Player matches allow for the use of multiple limited and banned cards in the same deck. Having 3 of Pot of Greed, Graceful Charity, Monster Reborn, Solem Judgement, etc. will make nearly any deck you make powerful enough to chew through the legacy duels like nothing.

** The Tag Force games allow you to use the Dark Synchros. Ordinarily, they're Difficult but Awesome, with their raw power balanced out by the trickiness in using a 0-ATK, high-level Dark Tuner to summon it... unless that Dark Tuner is [[https://yugipedia.com/wiki/Dark_Tuner_Doom_Submarine Doom Submarine]]. Doom Submarine can revive itself once per game while you control no monsters, and it's Level 9, meaning it can summon pretty much any Dark Synchro you could want. Discard Submarine, Summon Submarine, Normal Summon something else... free Dark Synchro.

** The Destiny Draw mechanic, which automatically placed a designated card on top of your Deck if you were losing, was remarkably abusable, letting you put game-winning cards on top of your Deck in the second turn with some good management of your Life Points. [[https://yugipedia.com/wiki/Afterglow Afterglow]], which shuffles itself into the Deck and wins the Duel if you draw it on the next turn, was probably the worst offender. What made it more egregious is that you can set a handicap that starts you off at an immense Life Point disadvantage, which allows you to immediately access Destiny Draw.

* The ''VideoGame/TagForce'' games allow you to use certain cards that were only in the anime:
** The Tag Force games allow you to use certain cards that were only in the anime, like the Dark Synchros. Ordinarily, they're Difficult but Awesome, with their raw power balanced out by the trickiness in using a 0-ATK, high-level Dark Tuner to summon it... unless that Dark Tuner is [[https://yugipedia.com/wiki/Dark_Tuner_Doom_Submarine Doom Submarine]]. Doom Submarine can revive itself once per game while you control no monsters, and it's Level 9, meaning it can summon pretty much any Dark Synchro you could want. Discard Submarine, Summon Submarine, Normal Summon something else... free Dark Synchro.

* The ''Tag Force'' games allow you to use certain cards that were only in the anime, like the Dark Synchros. Ordinarily, they're DifficultButAwesome, with their raw power balanced out by the trickiness in using a 0-ATK, high-level Dark Tuner to summon it... unless that Dark Tuner is Doom Submarine. Doom Submarine can revive itself once per game while you control no monsters, and it's Level 9, meaning it can summon pretty much any Dark Synchro you could want. Discard Submarine, Summon Submarine, Normal Summon something else... free Dark Synchro.
** Even as Dark Synchros go, Hundred-Eyes Dragon is incredibly strong. It can be played with a simple combo of Doom Submarine/Infernity Randomizer or Mirage, it has a nasty 3000 ATK, and it has three effects. The first shuts down opposing Spells and Traps while it attacks, the second gives it the effects of ''all the Infernities in your Graveyard'' (which can include piercing and burn damage, drawing a card every turn, indestructibility by battle or effects, summoning Infernities from the Graveyard, or ''making it impossible for you to lose the Duel''), and the third lets you, whenever the Dragon is somehow destroyed, add ''any'' card from your Deck to your hand. This last effect combos perfectly with fellow anime-only card Cursed Prison, letting you Summon it instantly in DEF, so that you'll be able to grab a card when it gets taken down.
** Fog Castle, which revives a monster up to four times after it gets destroyed, is incredibly abusable with any card whose effect activates upon destruction. How does knocking 35 cards from your opponent's Deck with a Voltic Bicorn sound? How about using Sangan to instantly draw out Exodia? If that wasn't enough, when Fog Castle runs out of uses, you get to take four monsters from your Graveyard and add them to your hand, massively boosting your advantage in the unlikely event that you haven't just won the Duel.
** Philosopher's Stone Sabatiel may be limited to one, but it can be added from your Deck to your hand whenever you lose a Winged Kuriboh, so it's incredibly easy to draw (especially with a Flute of Summoning Kuriboh). What's it do? Let you pay half your LP to add any card from your Deck to your hand. And then it goes back to the Deck, letting you play it again. After three activations, it turns from its original effect to one that multiplies one monster's ATK for a turn by up to 5, potentially giving you a card with over 10,000 ATK... and somehow, that feels like a downgrade.
** Trick Battle (a card that reverses the results of a battle so the stronger monster gets destroyed, but damage is still calculated normally) sounds like a quirky bit of fun... until you combo it with Colossal Fighter, a card that can revive itself when destroyed. Summon Colossal Fighter, activate Trick Battle, attack a weaker monster. Your opponent takes damage, but the weaker monster stays and Colossal Fighter gets destroyed. Since it was technically destroyed by battle, you can Summon it back, and since you Summoned it back, you can attack again. Repeat until the opponent dies.
** The Destiny Draw mechanic, which automatically placed a designated card on top of your Deck if you were losing, was remarkably abusable, letting you put game-winning cards on top of your Deck in the second turn with some good management of your Life Points. After Glow, which shuffles itself into the Deck and wins the Duel if you draw it on the next turn, was probably the worst offender. What made it more egregious is that you can set a handicap that starts you off at an immense Life Point disadvantage, which allows you to ''immediately'' access Destiny Draw.