In Isekai stories, it is common for the protagonist to receive a "cheat" skill that grants them unique or broken abilities.
Common staples of Japanese/Chinese Trapped in Another World Light Novels. Depending on the work, the cheat can grant support type abilities that ranges from granting a major advantage, to outright doing the work for the The Protagonist. These kinds of abilities tend to be either Wrong Context Magic, or a "regular" magic in the native world that's amped Up to Eleven.
As Stock Light-Novel Hero explains, the hero of such stories tend to gain their power not by training, but by virtue of being where they are. As many Isekai stories follow the Role-Playing Game Verse, "protagonist gaining skills in a (VR) game" becomes "protagonist gaining skills in another world" due to earlier influence.
Note that it doesn't necessarily have to be a particular skill or ability. Anything that allows the MC to be superior to the regular mortals can be counted as an Isekai cheat. Common examples include vast knowledge that is far superior to the technical knowledge of the world the MC gets reincarnated or transported/trapped in, Power Copying in skill steal novels, extremely high stats/level in RPG-Mechanics Verse, an item (weapon, artifact, clothing, etc) that empowers them greatly (and typically belongs only to them), etc.
One common twist to this is that there may be some other characters who possess this kind of "advantage", whether it's a character in the world's setting or another character from the protagonist's native world who also got trapped in this new world. They could either be rivals to overcome, or friends to connect and ally with.
Usually granted during reincarnation, either automatically acquired or granted by the resident God or Goddess during the reincarnation process.
This is rare in Western Trapped in Another World stories, as the focus tend to be "how an ordinary person perceives a fantasy world" rather than the "Deep-Immersion Gaming" style of storytelling of the Eastern kind.
The trope's title is meant to reflect the overly long, descriptive nature of Japanese Light novel titles.
- MÄR: The protagonist Ginta was nearsighted and not athletic in his old world. When he is summoned to another world he has Super Strength and perfect eyesight. The explanation for this is that the New World has lower gravity, which actually does not explain it at all. However he does not have any magical power at all until he starts training, though this was an advantage because it allowed him to obtain Babbo, who was sealed in a chest that could only be opened by somebody with no magical power.
- Deconstructed in Aura Battler Dunbine as antagonists summoned from another world share the same merits. When Shot and his partner Zet got summoned to Byston Well, their revolutionary Aura Machines turned once peaceful afterlife fantasy world into a war zone very quickly. Furthermore, their weapons are not limited to just their world. When their weapons get sent back to Upper Earth, warfare additionally spreads all over, leaving millions dead and causing massive political chaos.
- Happens to four characters in El-Hazard: The Magnificent World. Protagonist Makoto Mizuhara gains the ability to interface and manipulate the technology of Ancient El-Hazard just by touching it, hard drinking teacher Masamichi Fujisawa games Super Strength... but only when he's sober (a situation he views very much being a case of Blessed With Suck, Makoto's Unknown Rival and one the recurring antagonists Katsuhiko Jinnai gains the ability to understand and communicate with the insect Bugrom while his younger sister's Nanami's powers vary depending on continuity. In the TV series she shares her brother's ability to communicate with the Bugrom while in the original OAVs she has the ability see through the illusions cast by The Phantom Tribe (who don't exist in the TV series, hence the change in powers).
- In Dr. Stone, the "other world" is technically just Earth, but after humanity has been petrified for 3700 years, nature has covered the whole world, making it nearly unrecognizable. Thankfully, most of the major character who get de-petrified bring extremely useful skills with them:
- Senku, the main character, is a Teen Genius with extremely advanced knowledge in practically all fields of science. He knows how to make increasingly high-tech items from scratch, survive in the wilderness, identify useful materials, etc.
- Taiju has near-limitless stamina and strength. He's too kind-hearted to use his strength for violent purposes, but he can easily take care of the large amount of manual labor needed to build up society.
- Like Taiju, Tsukasa also has enormous strength. Unlike him, he's also a highly skilled mixed martial artist, making him into the group's main combatant and hunter... at least for the short time he's with them, as he quickly becomes the Big Bad.
- Yuzuriha has amazing manual dexterity. On top of making her a great seamstress, she's also able to reassemble petrified humans that have been smashed to pieces, allowing them to be revived.
- Gen is The Social Expert, boasting profound knowledge of human psychology. Once he joins the Kingdom of Science, he's able to persuade others into joining his cause, and manipulate or bluff enemies.
- Hyoga was another combatant with practically superhuman skills similar to Tsukasa. His skill with the kudayari spear makes him practically invincible in combat.
- Homura was a talented gymnast, which makes her so agile and skilled at traversal and Le Parkour that only the absolute fastest of the "cave people" can keep up with her.
- Ryusui was an expert sailor before the petrification event, and his talent for navigation proves useful when the Kingdom of Science wants to expand or travel to new lands.
- The protagonist Zed follows a mysterious angel like being into a portal to another world where he learns that it is a spirit named Amir Gaul,, one of the six most powerful spirits in the world known as the key spirits, that he is the chosen owner of, though at first Amir Gaul won't obey him, so to compensate he obtains a powerful new sword and a second spirit called Rambos who is also very powerful though weaker than a key spirit.
- Zed's friend Noah gets summoned to the same world because he is the destined owner of another key spirit. But unlike Zed he does not already have a spirit. The only bonus he gets is his chronic illness being healed with magic, though not permanently cured, until he stumbles across his destined key spirit by chance.
- Dungeon Keeper Ami: When Ami arrives in Adushul, she becomes a Dungeon Keeper, making her effectively immortal, increasing her magic capacity, and gaining a place to call home, all at once. She also gets a Horned Reaper, one of the best fighters in Adushul.
- Keeping with the theme of the original series this keeps happening in El-Hazard fanfiction "The Shape of Things to Come". Newcomer Mari initially thinks her power is making water boil but it's merely a side-effect of her real power, Healing Hands, while Sakura's powers are not properly defined and mostly obscured by her fusing with an incomplete, prototype Demon God. Meanwhile Makoto, having travelled between Earth and El-Hazard for a second time after recovering Ifurita gains a second power, prophetic visions
- A Knight's Tale as Inquisitor: Through a series of events she doesn't remember, Arturia has wakes up in Thedas with the Anchor, which beneficial magic she is uncovering more and more of, which includes being able to close the Hellgates spread everywhere on her new home and knowing every single language she comes across in this new world.
- KonoSuba: Aqua, the current Goddess in charge of reincarnation, has been granting these perks to various Japanese individuals to aid them on the quest to save her world from the demon lord. One such example is Kyouya Mitsurugi and his legendary sword. When the protagonist Kazuma is looking through his options, Aqua gets on his nerves so badly that he chooses Aqua herself as his "reincarnation perk", to mixed results.
- It could also be argued that Kazuma's real "reincarnation perk" is simple common sense, which the series repeatedly demonstrates is in frighteningly short supply in the fantasy world, as seen by the likes of Wiznote and Meguminnote . It speaks volumes that Kazuma is a greedy, selfish jerk and yet is still the most level-headed person for miles.
- That Time I Got Reincarnated as a Slime:
- Rimiru Tempest has Predator, allowing him to copy the abilities and transform into any creature he eats, Great Sage, a nigh-omniscient guide that can tell him almost anything about the world, Pain Nullification, which allows him to Feel No Pain, and the ability to No-Sell most types of attacks (including ice, fire, and piercing attacks). And he is a Slime, so he can regenerate his body. All were acquired when the world interpreted his dying thoughts as him desiring these abilities, completely without his realization until after the fact. On top of this, he first appears in a cave filled with magical plants: by eating all of them, he absorbs a tremendous amount of Magicules, granting him a nearly-bottomless supply of magical energy as well as the ability to craft large amounts of extremely powerful healing potions. Towards the end of the series, he gains the ability to access any point in Space-Time without causing a paradox threatening his own existence. He gets so many cheats later that his cheat skills begin to develop cheat skills.
- People from Japan getting transported to the other world is actually a common occurrence, though Rimiru's method of getting there by dying and coming back as a different species is an unusual case. People from our world get a huge magical power boost whether they ended up there by chance or by being summoned, though those who were summoned are not as powerful as the former, and those who were summoned as children are unable to properly use their powers and die unless they bond with a strong spirit to help them control their powers.
- How NOT to Summon a Demon Lord: Diablo possesses his MMORPG Cross Reverie's avatar granting him all of its abilities including his counter-stop level 150. He leveled up his avatar in a video game where Death Is Cheap, whereas the fantasy world he's summoned into doesn't have resurrection, so although it's theoretically possible for adventurers to get close to Diablo's level, it's extremely unlikely in practice, since you'd have to defeat increasingly dangerous enemies regularly for years without dying once.
- He also has an assortment of top-tier equipment, most importantly The Demon Lord's Ring, a drop from defeating the Demon Lord of the Brain, Enkvalos, which takes pretty much any magic cast on him and automatically reflects it back at the caster.
- Overlord (2012): Ainz Ooal Gown reincarnates in his YGGDRASIL VRMMORPG avatar. He has level 100, unique classes, all of his similarly powerful comrades equipment, their guild base (one of the strongest guilds in-game) is an entire army including 8 other level 100 servants; with absolute authority over all.
- Log Horizon has the perks of simply being an Adventurer. Gaining experience at four times the rate as a native of the world, coupled with the ability to come back after death with only a small experience penalty. In addition, Adventurers summoned from Earth arrive in the bodies of their video game avatars, the majority of which are at high levels already, since the MMORPG in question has been running for twenty years by the time the mass-summoning happens. What makes this series unusual is that these perks apply to hundreds of thousands of former Players, rather than it being unique to the protagonist.
- In The Rising of the Shield Hero, four "heroes", including Naofumi, the protagonist, are summoned to a RPG-Mechanics Verse and assigned a legendary weapon. This weapon cannot be removed, and the heroes are not allowed to wield any other weapon, but the legendary weapons can absorb different materials (such as those obtained from defeated monsters) to unlock various transformations with different abilities. Naofumi, being the Shield Hero, becomes an extreme Stone Wall who is practically immune to damage from weaker foes, and can use his shield to protect himself against attacks from stronger ones, at the downside of having pitiful damage (it takes him several minutes to defeat a single Balloon monster) while others can one-shot them. At first, he compensates for this weakness by relying on his teammates for offense while he focuses on protecting them. He soon obtains a second Isekai Cheat that propels him above the other heroes: the Curse Series, special shields that offer immense power at the price of causing him to be overwhelmed by his emotions and risking losing control.
- In No Game No Life, Sora and Shiro are NEETs who are summoned to Disboard, a world where all conflict is resolved through games. Thankfully for them, the duo are experts at all sorts of games, allowing them to quickly rise in the world. They view chess as easy as Tic-Tac-Toe, having memorized 10^120 chess states.
- In In Another World with My Smartphone The protagonist Touya gains blessings upon being brought back to life in another world. Two of them are the ability to use magic and his smartphone still being functional in the other world. These are gift of "God" who really wished to make up for accidentally killing the Touya back on Earth.
- From the gift to use magic, Touya can use all known seven elements of magic, Fire, Water, Earth, Wind, Light, Darkness, and Null. For the locals, it is more common to have just two elemental affinities. Three is rarer, and six is totally unheard of. With all affinities, Touya can equip a coat that reduced damage only for magical attacks that are the same element as the wearer's affinities, but doubles damage for attack from elements the wearer doesn't have affinities for. But more importantly, he is able to gain access and inherit Babylon, an advanced floating magitek facility built five thousand years ago and divided into nine pieces, as only a person with all affinities can activate the teleportation gates needed to enter. As it turns out, Regina Babylon, who also had all seven affinities, had foreseen Touya's arrival and built Babylon just for him. She'd even copied her consciousness into a gynoid so she'd able to work with him in the future.
- Also from his magical gift, Touya can use any Null magic spell and combine their effects, an impossible feat since in the spells that make up Null magic for the most part exclusive to their creators. And that's not even counting the fact that humans can have at most two Null spells in their repertoire. The more magically-inclined fairies can have only up to five. This means Touya can do all sorts of things like create teleportation portals to any place he has memories of, remove ailments like blindness and poison, reshape a shard of a dragon's fang into a modern-day gun, etc...
- Touya's request to "God" was that he would be able to bring and use his smartphone in the fantasy world. So not only does "God" make it that he is able to recharge his phone with magic, but that the phone will be useful on Touya's adventures. While he can no longer contact with anyone on Earth, Touya can still visit websites on Earth, good for looking up information of technology he wants to create and give to his allies. The phone map application has been changed to provide maps of the fantasy world, and can be used to extend the range of his magic. And that's not even mentioning that the phone has a direct line with "God".
- Sword Art Online: Kirito's hugely boosted stats in the VR game are explained by his having been a beta-tester for the game, in effect getting a head start compared to other players thanks to having prior knowledge of the first several floors (though he wasn't alone in this advantage and it comes as a nasty shock that several things were changed after the beta and before the full release). The ALO and GGO arcs also has Kirito discovering that the developers used the same engine as Sword Arts Online for their games and his avatar's insane power level carries with him as an unexpected Old Save Bonus, which comes in handy since he's out of his depth in mastering the different mechanics such as flying and magic in ALO or the gun-based combat of GGO.
- Because There Were 100 Goddesses in Charge of Reincarnation, I Received 100 Cheat Skills: As the title implies, Toujou Karuna has one hundred of these "cheats". Full list here. Note that contrary to the title, these skills are merely skills, not "cheat" skills, explaining why some of his skills are low powered and not a traditional example of Isekai cheat.
- Death March to the Parallel World Rhapsody:
- Initially, Satou possesses the three time disposable skill "Meteor Shower" which allowed him to wipe out a whole map of enemies, including the Dragon God and go from Level 1 to 310 in one shot. He then gets the upgraded version minutes later.
- Arguably his even more useful ability, "Menu" allows him to immediately copy any ability anyone uses in his presence, including enemies, and also gain the resistance to any elemental attack or debuff used against him. He can master skills whenever he feels like it by spending some of the 3100 skill points he got from leveling up. For example, he can unlock a new language just by hearing a single word, and he can max it out immediately. Each skill has 10 levels of proficiency, with 1 being beginner and 10 being God-level. A low-tier spell is mistaken for a high-tier one at level 10.
- If they don't suffice, he also has Immortality.
- Warlock of the Magus World: Leylin Farlier has the A.I chip, basically a super-computer with absurd level of processing capability. Born from the A.I chip he had in life as a scientist fusing with his soul during his reincarnation in a Million-to-One Chance chance in a world where knowledge equals power, he becomes Master of All and is easily becomes The Ace in 600 years compared to the eons spent by others.
- Chihou Kishi Hans No Junan is about the titular Hans, a knight in charge of a backwater town in a Medieval European Fantasy who has to deal with multiple people with stupidly overpowered abilities and New Powers as the Plot Demands (all of whom are from Japan for some reason) and get them to stop drawing the attention of the large countries who would be very glad to weaponize these new arrivals (whose skills range from The Beastmaster who can convert entire villages of beastmen to his cause, the Pint-Sized Powerhouse who's basically the Hulk as a ten-year-old girl, etc.). The title translates to "The Suffering Of Local Knight Hans".
- Gate: While the main characters from Earth aren't overpowered in and of themselves, the entire point of the series is to show the Japanese Self-Defense Forces curbstomping a civilization with Roman Empire-levels of warfare.
- A Wild Last Boss Appeared!: The main character reincarnates as his character Lufasu, who was the, well, Final Boss of the MMO he played obsessively. As the story progresses, it's implied Lufasu was reincarnated into his body back on Earth.
- Elcenia: Rhysel is originally already from a Magical Land and retains her Barashin kamai powers, letting her do things that are impossible by Elcenian standards.
- The Death Mage Who Doesn't Want a Fourth Time: Vandalieu Zakkart possesses the unique Death Attribute magic and an immensely large mana pool that surpasses most Gods.
- He is odd in that he has also been inflicted with 3 curses that hinder him quite a bit.
- The premise of the LN and manga I've Been Killing Slimes for 300 Years and Maxed Out My Level is that the protagonist worked herself to death as an Office Lady and was granted her wish of immortal youth as a witch in a standard RPG-Mechanics Verse. The overpowered aspect comes from the fact that she killed about 20 slimes every day for three hundred years and thus reached the maximum level without ever realizing it (because she never had to fight anything tougher than a slime).
- Parodied in Woof Woof Story; the protagonist doesn't ask for anything magic (he just wants to be a lazy, well-fed housepet) but the goddess gives it to him anyway, because everyone before him asked for something cool and she doesn't want to be unfair.
- Isekai Cheat Magician gleefully embraces this trope from its title and premise, having its two main characters being transported into a fantasy world with incredible magical abilities.
- Do You Love Your Mom and Her Two-Hit Multi-Target Attacks?: Both the teenage protagonist and his mother, being registered as beta testers, get to pick a powerful weapon to start their adventure with. The titular mother, though, gets to wield two, and has a monstrous strength stat to deliver her two-hit-multi-target attacks. As other mother characters are introduced, it is implied that all participating mothers are given a perk that grants them outstanding power.
- In I Will Survive Using Potions, the protagonist has the ability to create potions with any effect she can think of, an ability she munchkins ruthlessly. Later she figures out the ability also grants the ability to create potion containers, which means that she can conjure up just about anything so long as it contains a compartment holding a potion.
- The protagonist of Didn't I Say to Make My Abilities Average in the Next Life? died a burnout after living her entire life under her family's expectations of her as a Child Prodigy, so she asked that she be reincarnated as somebody totally average. However, the godlike being responsible for reincarnating her horribly misinterpreted her desire, so instead of being average by human standards, her physical and magical abilities were set halfway between the weakest and strongest of all sentient life in her new world, including dragons. As a result, Mile finds herself about 6,800 times stronger than a normal human. Hilarity Ensues.
- Shin of The Wise Grandson died in an accident and was reincarnated in a new world where he was adopted as the grandson of legendary magic user Merlin, but by the time he enrolls in the magic academy, he is already more powerful than Merlin due to his memories of physics from his old world making him amazing at casting spells, but unfortunately his grandfather forgot to teach him social skills or anything about the world.
- Youjo Senki: Tanya is an obscenely powerful mage and the only one able to use an equally obscenely powerful Super Prototype magical focus due to a divine blessing. Her/his 21st century knowledge is another powerful cheat in a world undergoing a rough equivalent of World War I. Compared to the standard, Tanya's vision of warfare is very clean and efficient, if rather soulless.
- In So I'm a Spider, So What?, the whole class of reincarnated students (plus their teacher!) was each given a special skill that gives them Level-Up Fill-Up, a unique skill suited to their personality and a metric truckload of starting Skill Points to spend upon their birth in the new world. These unique skills include such things as being able to create weapons out of thin air, create shadow clones or just being very lucky. Oddly enough however, the protagonist herself is a severely downplayed example: she has a very small amount of starting Skill Points (the smallest of any of the reincarnated students, in fact) and her "unique" skill is simply the upgraded version of a speed increasing ability, one that anybody could acquire with enough effort, albeit one that proves responsible for saving her life several times early on. To add insult to injury, while some of the other students got to be reborn into notable families (including royalty), the protagonist was reincarnated as the weakest spider monster in the middle of the most dangerous dungeon in the planet! This disparity only endears her to the readers even more, however, as the protagonist becomes the most powerful of the reincarnators while they're all babies through sheer hard work, stubbornness and determination, all while the charming spider tries to be upbeat about it.
- Much later, the disparity in starting power is revealed to be because it reflects the state of the soul, and the protagonist's non-human soul was initially that much weaker than the other reincarnators. This also explains why said reincarnators are so much more powerful at birth than most natives of that world, as their souls are fresh while the natives have been forced to reincarnate over and over every time they die, denying their soul the rest and recovery it needs to keep itself healthy, which directly translates into the efficiency and effectiveness of the power it can harness.
- A much older example, John Carter of Mars has Super Strength on Mars, which the book explains is because he's accustomed to the higher gravity of his home planet Earth.
- Subverted in Everworld, where the cast is just as lost and powerless as you'd expect average high-schoolers to be when dragged into Another Dimension where All Myths Are True. The only things they have going for them are the ability to not go in blind (whenever they go to sleep in Everworld, their conscious mind snaps back to the original world, so they can look up whatever gods and culture they've run into) and because they were dragged in with all the possessions they had at the time, they're eventually able to make use of them (by trading the recipe for gunpowder in a chemistry book or by using a CD player as a marketing gimmick to convince merchants to invest in a telegraph). Senna also takes heed that modern technology still works, and drags a bunch of white supremacists with guns to Everworld as her personal army for the finale.
- Another much older example, in Three Hearts and Three Lions the protagonist Holga gains abilities and equipment now commonly associated with a Paladin: The innate ability to fight expertly with a sword, the ability to invoke minor divine powers, armor, a sword, and a Cool Horse. However, his most consistently useful feature ends up being his entirely average 20th century education.
- Galidor: The protagonist Nick Bluetooth and his best friend Allegra travel to a series of other worlds called The Outer Dimension. The inhabitants of the Outer Dimension possess a power called glinching that allows them to swap body parts with each other. After arriving, Nick discovers that he has a much more powerful version of glinching that doesn't require a partner, allowing him to transform his arms and legs into objects he has previously seen, including weapons and the body parts of other creatures. It turns out he possesses this power due to being a half-human, half-Galidorian, which gives him a uniquely stable body that can hold an enormous amount of glinch energy. Allegra doesn't get any powers, but makes up for it with her martial arts skills.
- Downplayed in Rakenzarn Tales. The protagonist gets a unique class called Arxus Rogue, which allows him to learn any skill or magic spell, as well as equip any weapon or armor. What makes it downplayed is that this class is technically available to anyone in Rakenzarn if they're willing to put in the time and effort to learn it and they still have to start at Level 1 like any RPG protagonist.
- Isekai Cheat Survival Meshi: Kazusa Yuu obtains the trait of those he eats.
- I Got a Cheat and Moved to Another World, so I Want to Live as I Like: Satou Tarou received healing magic and the knowledge to produce potions from a God-like existence.
- I have Became Able to Do Anything with My Growth Cheat, but I Can't Seem to Get out of Being Jobless: Ichinosuke's advanced growth rate (a combination of "gains 20x normal XP" and "needs 1/20th the XP to level"), allows him to develop 400 times normal. This combines with his retaining the default "Jobless" job, which levels impossibly slowly (for anyone else), but is broken due to the goddesses involved not expecting anyone to ever keep it.
- Modern Weapons Cheat in Another World: Nagato Kazuya can summon living soldiers and military vehicles and technology.
- I Made a Slave Harem Using a Charm Cheat in a Different World: Miura Ryouta has "Absolute Charm" allowing him to make any women fall in lust with him.
- Himekishi ga Classmate! ~ Isekai Cheat de Dorei ka Harem~: Odamori Tooru has Slavemancer, a Cheat class that can control the minds of others.
- HP 9999999999: Azora Yuuto, reincarnated as the High King who rules over the demon race has 9999999999 HP, 9,999,999,999 MP, 99,999 ATK, 99,999 DEF and so many skills the display glitched out.
- Being Able to Edit Skills in Another World, I Gained OP Waifus: Skill Structure allows Nagi to do exactly that.
- Level Up Just By Eating: By eating anything Kehma is able to gain and experience points and skills as well as level them up.
- Picked up a Demon King to be a Maid: Lin Xiao can get stronger and rise in rank through simply sleeping.
- Instant Death: Yogiri Takatou can induce Instant Death. Partially subverted because it is revealed that he had already that power in his original world that is, apparently, Earth. He was also hosted - or "contained" - by a sort of SCP Foundation. However he is a gentle and very quiet guy. His power does not appear on the "statistics" of the world he was summoned so that he is seen as a easy prey but, whatever is to kill him, dies automatically.
- Although I Am Only Level 1, but with This Unique Skill, I Am the Strongest: Satou Ryouta has S-grade in all Monster Drop skills, allowing him to obtain item from defeating monsters to raise his stat.
- Because I Was Excluded Out of the Class Transfer, I Decided to Steal My Classmate's Lover: Kirishima Ran can use Underling Training to mind control women.
- Living in this World with Cut & Paste: Myne posses Appraisal Complete and Cut & Paste, allowing him to view the skills of others, remove it and add it either to himself or anyone/anything else.
- Using Gacha to Increase My Companions and to Create the Strongest Girls Army Corps: Girl Corps, the game Heihachi Okura was playing became real in another world, allowing him to summon the characters.
- Skill Takers World Domination ~ Building a Slave Harem from Scratch: Konoe Yuuto's Ability Looting ( Skill Taker) allows him to steal the skills of others, born from his martial arts style of copying other style's techniques he practiced in life.
- Kujibiki Tokushou: Musou Haremu ken: Yuki Kakeru posses an ability that increases his overall ability and growth rate 777 times.