Looking for Undertale + System Stories ㄟ( ▔, ▔ )ㄏ 求写传说之下+系统 ㄟ( ▔, ▔ )ㄏ

1. 1 传 Undertale: The Story of an ULB 传说之下：一只ulb的故事 Leader of the Way of Great Peace太平道道主Anime Fanfiction150k WordsCompleted Give him one molecule of oxygen and he'll dance until the world ends. He is the fearsome ulb. General of the Army Douglas MacArthur, speaking from far away on the surface, once said, “If God told me to defeat ulb, then God himself would have to join the battle with a real sword.” Asgore, king of the Underground, also said, “From the moment I appointed ulb as judge, I knew I would never see another slaughterer again.” Frisk, humanity's ambassador for peace, said, “After ulb's trial, I never commi 208Reads7.1Score—Shelves

   Reader note

   Both of these books have systems; one is discontinued and the other is complete.

2. 2 成 My UT Journey as a Sans Soul 成为sans灵魂的我的UT之旅 Skeleton Wearing the 4 General's Skin穿着4总皮肤的骷髅Anime Fanfiction142k WordsOngoing A devoted UT fan, Li Xiaoti spent several days gathering every bit of information about UT and building a massive website about the UT universe. But due to health problems, he unexpectedly ended up in the world of UT, bringing the website he had created along with him. The bad news was that he was only a soul. The good news was that he was Sans's soul. When he suddenly looked at Sans, he saw more than just Sans before him: a faint image of Killer appeared too... 183Reads7.1Score—Shelves
3. 3 化 As UKB: Seriously, Why Is the Multi-World Prosecutor Still Chasing Me? 化身UKB：不是，多审还在追我 Xiao Yuan-chan小源酱Anime Fanfiction292k WordsOngoing "No System, not invincible, few tearjerkers (because the author isn't very good at writing them either)" AU title: [Undertale: Karma Fire Samsara] (Suitable for casual play, not too exhausting.) Li Yuan stayed up all night grinding CTT, then died suddenly along with his computer. When he woke up, he had become Sans. But the player here didn't seem like a good sort. After twelve consecutive failures, the timeline went a little haywire on the thirteenth attempt. A secret beneath the cliff. A stran 419Reads6.7Score—Shelves

   Reader note

   The first book doesn't have a system, the second one does.

4. 4 传 Undertale: Am I Playing Sans? 传说之下：我扮演sans了？ The Sourest Fish with Pickled Cabbage最酸的酸菜鱼Anime Fanfiction775k WordsCompleted (Transmigration + OOC + chat group) Wait, how did I become Sans from Undertale? The System floating in the air answers all his questions. And from the very beginning of his transmigration, he’s thrown into a hell-level challenge. After completing it, he must travel to different parallel worlds under Gaster and the System’s supervision. (Worlds completed so far: Original, Horror, Dust, Swap, KTT, and Insanity) 807Reads7.3Score103Shelves
5. 5 传 Undertale: Soul Swap 传说之下，灵魂转换 Phantom Star Mage诡影星师Anime Fanfiction229k WordsCompleted Also known as: Spark Legend [Undertale] [Lots of original worldbuilding] [Characters from multiple AUs appear] [Female lead: Betty] [True Hard Mode] Red, orange, yellow, green, blue, indigo, violet, gray, white, and black: ten souls in all. Oi, kid, have you ever seen a human who can switch between different soul traits? Today, the beast in human clothing Bai Ming has arrived! The barrier isn't the monsters' greatest seal. The true seal is a curse that resets whenever monsters reach the surface. 50Reads—Score—Shelves

   Reader note

   Under the legends, but without a system. However, the protagonist, Bai Ming, has a guide similar to Chara—Xu Ming—who will help Bai Ming at crucial moments.

6. 6 来 A Monster from Undertale: Sans 来自传说之下的怪物：sans A Lump of Lazy Bones sans一坨懒骨头sansAnime Fanfiction423k WordsOngoing After arriving in the Undertale timeline and becoming Sans, he gains the power of Causality Code and puts a stop to the player’s genocide run. He goes to the surface with Frisk and the others, only to discover that human scientists have also begun researching “soulology.” The source of it all is the anomaly caused by that player. But Sans has no intention of taking on a whole skeleton-load of trouble. Still, one thing after another comes his way, and Sans catches sight of versions of himself fro 661Reads—Score100Shelves

   Reader note

   I'm here, a time traveler with a system. But the system is just an aid; there are other Sanses in distant universes as well.

7. 7 原 Genshin Impact: I Become Lazy Bones Sans from the Start 原神：开局变成懒骨头sans I'm Really Shi Le我真是时乐啊Anime Fanfiction358k WordsCompleted [Undertale + Genshin Impact + Nearly Invincible + System + Infinite Flow + Tearjerker + Protagonist’s Emotional Growth] “Dude, how is this lousy skeleton so strong?” After being blown to bits by Yuan Shan for the 1,145th time, Shi Le, an 80-year-old Undertale fan, thought back on his pathetic life and finally snapped (sob). When he woke up again, he was already in Mondstadt. “Dude, did I actually become Sans?” 509Reads7.6Score100Shelves
8. 8 传EN Undertale: I Forge the Perfect Ending! 传说之下：我！完美结局铸造者！ Chuan Shang Mang Ke川上芒可Anime Fanfiction208k WordsOngoing (Toxic-content warning: There is a female lead, neither lead is particularly strong, there are other transmigrators, some details involving time travel are inconsistent, and the pacing is slow at first. If you can accept all of that, then let’s begin!) AU name: LD! Undertale Lin De accidentally transmigrates to the world of UT! To reach an even more perfect ending, he travels through time and space, stepping outside the grasp of the unseen hand behind the scenes, all to understand the truth of t 281Reads8.7Score—Shelves
9. 9 穿 I Transmigrated to Genshin Impact, and I’m a Skeleton? 穿越原神之我是个骨头？ Lazy Ghost Blows Out the Lamp懒鬼吹灯Anime Fanfiction155k WordsCompleted Lan Gu transmigrated into the world of Genshin Impact and became a god, but his brother was gone, so he set out to save him. P.S. The protagonist's abilities are roughly like Sans's. No System. A female lead may or may not appear. 80Reads7.3Score—Shelves

   Reader note

   Both of these are actually quite good. One is finished, and the other seems to be still being serialized. There's another one I can't post, probably because it has too few words; it's called *Undertale: Mo Li*.

10. 10 国 National Fate: Sans's Bizarre Adventure 国运：sans的奇妙之旅 Wan Yi WY万意WYAnime Fanfiction448k WordsOngoing [Undertale] + [National Fate] + [Watch-Along] + [Various Sanses] + [Minecraft] + [Indie Games] + [ErrorTale] + [Pleasant Goat and Big Big Wolf] After countless massacres, Player left this world for reasons unknown. The Underground Kingdom enjoyed a long period of peace, and thanks to Frisk’s efforts, the monsters reached the surface and began a new life. However, the arrival of the National Fate System brought new changes to this world… I’m a new author, so I may revise some chapters repeatedl 321Reads8.6Score—Shelves
11. 11 传 Undertale: It All Begins with Transmigration 传说之下：从一场穿越开始 The Sourest Fish with Pickled Cabbage最酸的酸菜鱼Anime Fanfiction518k WordsOngoing For reasons unknown, a human arrives in the game Undertale on a soul level. The compatibility between their identities and souls leaves them barely able to tell who they really are. Are they Sans, a human, or somehow both? Here, they seek the answer. And when they finally find it, they will shatter the chains of fate and set out into the boundless cosmos to create a story of their own. (A large number of characters will appear in this book, and many redesigns have already been planned: the UKB r 922Reads—Score109Shelves
12. 12 传 Undertale: Her Journey, His Echoes 传说之下：她的旅途，他的回响 Xu Xun, Who Loves to Argue爱吵闹的绪寻Anime Fanfiction130k WordsOngoing (This is the author's first time writing, so the prose may not be very good. Feel free to discuss the setting, but please don't bring your personal headcanons into other works.) This book is also known as Undertale: This Human Is Adventuring Again Today I'm not good at writing synopses. Please head straight to the story. After the multiverse arc begins, the romance will be different from what came before, including the blurb. When he woke up, Ze Peng found himself on a mountain. As he walked for 175Reads6.6Score—Shelves
13. 13 原 Genshin Impact: The Skeleton from Amphoreus 原神：来自翁法罗斯的骷髅 Too Lazy to Move Fungus懒得动真菌Sports589k WordsCompleted [Players, gacha pool, mainly Genshin Impact] After finally recreating Amphoreus, I somehow ended up on a continent called Teyvat. As the saying goes, since I’m already here, I might as well settle down. Player: So that’s why you’ve been to all seven nations? Sans: I’ve got some stir-fried snow here. It won’t cost 9,999, or even 999, just 99,999 Mora. Player: Here you go. Sans: Sorry, but I don’t have any stir-fried snow. (Shrugs) [The synopsis is beyond my abilities.] 192Reads—Score101Shelves
14. 14 e The Wonderful Journey of Error error的奇妙旅程 Han Linyue寒临月Anime Fanfiction361k WordsOngoing [Undertale AU fanfic + My take on Error as the protagonist + Not hot-tempered or quick to anger + Error based mainly on canon, with my own additions + No Romance for Error in the main story + Unorthodox National Destiny + Watch-Along Reveals the Truth + Multiverse] The National Destiny game is just a starting point, and most of the on-screen comments are friendly. Because of an unknown program, Error arrives in Aftertale to take part in a National Destiny game. Although the creator’s will means 432Reads8.7Score101Shelves
15. 15 国 National Fate: But Xiaohua 国运：但是小花 User30021124用户30021124Anime Fanfiction182k WordsCompleted Undertale, UT, national destiny, no female lead, no CP, Flowey, AU, revealing the past. No transmigration, no System. A fanwork based on the original, set on a special timeline. As you can see, the protagonist of this story is Flowey, or rather, Asriel. Flowey's characterization will stick as closely to the original as possible. There will be AU cameos. I'll try to follow the original settings for the AUs, but there are too many of them, so anything that differs from canon can be treated as my o 372Reads6.9Score—Shelves
16. 16 u UT Fanfiction: Beneath the Dust ut同人：尘封之下 Villainous Player罪恶玩家Anime Fanfiction456k WordsCompleted [Standalone AU] [A little multiverse] [Plot-focused] [Follows the original] When this world becomes more beautiful than before, and threats from far away and close at hand turn to dust, I'm safe. But why can't I feel happy at all?, Sans "This guy isn't quite like the one in my memories, is he?" Watching the human beside me keep their head down and say nothing, stuffing their own pie into their mouth, I can't help wondering: is this really the same maniac who killed me hundreds of times in my dre 209Reads—Score105Shelves

    Reader note

    The legendary system exists... But it didn't say it had to be used on the protagonist, right? 😅 [Think about it carefully]

17. 17 传 Undertale: A Heavy Redemption 传说之下：沉重的救赎 UT EnthusiastUT爱好者Anime Fanfiction355k WordsOngoing (If you don’t like it, you don’t have to read it. This novel won’t include pairings from other AU fan works. No donations from minors, and no malicious reporting. Say no to online harassment.)(And thanks to everyone still reading my novel. This book is my way of making it up to you.) Fake simulation + multiple female leads + slightly yandere + angst + redemption + harem + a little OOC Note: No NTR + canon pairings will not be broken up. My name is Meng Chen. Three years ago, I accidentally trans 1.5kReads—Score155Shelves

    Reader note

    I wrote it myself…

18. 18 传 Undertale: She’s Not the Protagonist 传说之下：她不是主角 Cat Cat Dog Dog Cat猫猫狗狗猫Anime Fanfiction373k WordsOngoing [Transmigration] [No Romance] [Ensemble Cast] [Everyone Is Strong] [A Little Golden Finger System, Redemption, and Wild Ideas] [Antagonist] [Slow-Paced and Lighthearted at First, Then a Transitional Middle] [Happy Ending] A lot of UT players transmigrated into this UT multiverse, a place that seemed peaceful on the surface but was actually rife with undercurrents... Narrator: *Among the people working to protect the peace of the universe, there is a hidden killer with the employee number 103. At 83Reads—Score—Shelves

    Reader note

    Although the system wasn't particularly outstanding, it was still present later on.

19. 19 传 Undertale: Blossoms That Never Fall 传说之下：永不飘落的繁花 A Wretched Human Licking Sugar off a Knife's Edge刀尖舔糖的屑人类Eastern Fantasy489k WordsOngoing (No CP + SF + HE + Upholding RightE = ?) In 201x, at Mount Ebott, Crow heard that no humans who went there had ever returned. So, with a missing-person flyer in hand and a bow on her back, she went to investigate. She saw Frisk trip over a vine and fall into a deep pit, so Crow jumped in after her. After freeing the Underground, Crow thought she had reached the end. But with Flowey’s prompting, she found Gaster and struck a deal with him… She would go uphold justice and grow stronger, while Gast 24Reads—Score—Shelves

    Reader note

    I'm not sure if it exists?

20. 20 U UT Fanfiction: The Golden Legend UT同人：黄金传说 LieZhAnime Fanfiction180k WordsCompleted Frisk accidentally falls into the Underground. Just as she thinks she is about to meet her end, she gets help, but the one who comes to her aid is a monster from legend. An Undertale fanfic with an original AU. Sans x Frisk. The AU is called Gold Tale. Updates are irregular, but it will never be abandoned. 21Reads—Score—Shelves
21. 21 N Nightmare Is Busy Again Today Nightmare今天也在忙碌 Terrible Artist or Terrible Writer画渣渣or文笔渣渣Anime Fanfiction518k WordsOngoing Updates are irregular for now, with each update being at least 1,000 words. Also, the author is terrible at coming up with names, so the chapters won't have titles. (All right, really, I just want to be lazy.) Please don't blame me if my writing isn't very good. (I did warn you in the title, after all.) The characters might be OOC at times. I'll try to stick as close to the original characterization as I can, but I'm not their mom, so they might not always be completely in character. Also, if so 88Reads—Score—Shelves
22. 22 g Ghost Wants a Peaceful Route ghost想要和平线 Unconventional Expectations非常规期待Anime Fanfiction517k WordsOngoing [Undertale fanwork] [Some original headcanons] [No pairing in the main story] The main plot follows Killer!Sans's official comic, and has currently reached the multiverse. Hi, I'm Ghost. I'm a ghost~ Right now, I have absolutely no idea what strange world I've fallen into. But that's okay! I can't remember anything anyway. I don't know whether forgetting is a good thing or a bad thing. I don't know. I sincerely hope it won't be long. So, Sans, go back to sleep for a little while. It'll be over s 632Reads8.4Score112Shelves
23. 23 u UT: Deviation ut：偏差 Li Xiaomi黎晓蜜Anime Fanfiction102k WordsOngoing [Undertale derivative + heavily altered setting + OOC + Nightmare gets put through the wringer + no romance in the main story, I love platonic pairings!] If everything deviated from how it was supposed to be, if everything changed, I think I’d say that we are not redeemed, we are not forgiven, and we don’t need the judgment of bystanders, because we are simply ourselves. (This blurb is a mess, don’t mind it.) This story came from the author’s frustration with the original Dreamtale setting and 256Reads—Score—Shelves
24. 24 一 Everything Began with a Mistake, but When Will It End? 一切从差错开始，又到何时结束？ A Big Shanshan一个大杉杉Anime Fanfiction42k WordsCompleted After everything went wrong for the protagonist, he transmigrated to Error Tale, but he didn’t fully merge with the body. His negligence led to everyone in his world perishing, so he decided to travel to other worlds and help the skeletons who were suffering. 24Reads—Score—Shelves
25. 25 传 Undertale: A Colorful Illustrated Tale 传说之下：缤纷绘卷 Flying Bitter Tea Seed会飞的苦茶籽Anime Fanfiction200k WordsOngoing The heart of color pulses between ash and faint light, on a land woven with determination and dust, a traveler with a unique “colorful determination” quietly appears. 20Reads—Score—Shelves
26. 26 骨 The Business of Bone and Shell 骨壳商途 crossbonesAnime Fanfiction109k WordsCompleted The Underground Sales Pitch of a Skeleton In this Undertale AU, [Legendary Salesman of 1997] Spamton swaps [bodies] with a [skeleton], but instead of landing in trouble, he smells [the opportunity of a lifetime]. He chooses the fiery [skeleton brothers] as his partners, repackages his obsession with [capturing humans] as a business venture, and starts preparing a [Human-Capturing Training Camp]. He turns the [spaghetti stand] into a storefront and promotes his own brand. With absurd marketing, 45Reads—Score—Shelves
27. 27 传 Undertale: Links of Hope 传说之下：希望的链接 A Lively Spirit灵动的心性Anime Fanfiction139k WordsOngoing “If you could start over and do the same thing again and again, would it mean anything?” “I don't know... I don't know if I still have the passion to do this.” “I just think it's fun...” “Tch... I think you just want attention...” “You!” 3Reads—Score—Shelves
28. 28 成 Becoming Error 成为error Zhiye Kalas Hali Si治也卡拉斯哈里斯Anime Fanfiction310k WordsOngoing An Undertale AU fanfic, mostly based on my own headcanons, not canon. About a certain skeleton who decides to become a destroyer. Due to circumstances beyond my control, an official pairing was added later. It doesn't appear in the main story, only in the extras. But after signing the contract, I couldn't change the tags, ugh. Everything the protagonist does comes from his own heart. Whether good or evil, it's his own choice. No pairings in the main story. [The protagonist doesn't consider hims 2kReads8.7Score114Shelves
29. 29 关 About My Love for an Oil Octopus 关于我喜欢一只石油章鱼这事 Clouds, Rain, Stars, and River云雨星河Anime Fanfiction329k WordsCompleted [Complete and signed] [Just an embarrassing old work] Nightmare otome It’s already an embarrassing old work (looks away) 102Reads8.2Score—Shelves
30. 30 原 Genshin Impact: A Journey Through Teyvat’s Dust 原神：尘埃的提瓦特之旅 Dust Watching the Show看乐子的尘埃Anime Fanfiction101k WordsCompleted [The author only wrote this book out of boredom, so the writing might not be very good.] A white room, A painful memory, A determination that will never die, A madman? A wondrous adventure, A chance to atone, A loyal friend. And so this adventure begins... 129Reads—Score—Shelves
31. 31 传 Undertale: A World Gone Wrong 传说之下，错误的世界 Bored Middle Schooler Jie Rui无聊的初中生劼睿Urban265k WordsCompleted A System that had just passed its evaluation couldn't wait to find its first Host. A Judge who had just experienced an era of peace. Everything seemed to fall perfectly into place, but it was all just part of “his” plan. 50Reads6.5Score—Shelves
32. 32 k Killer Doesn't Want to Move killer不想动 Gray Baiye灰百叶Anime Fanfiction501k WordsCompleted [Undertale AU fanfiction + No romance + Dual protagonists + Dual personalities + No System] A crossover with my previous book, Transmigrated as Horror, set in the same world. Also known as I Became Killer's Other Personality. A soul from another world merges with a soul in pain. Sharing their memories allows them to trust each other. Along this long and painful road, will they find redemption, or fall into the abyss... “I long for peace, but fate always pushes me toward a different path.” “P 1.3kReads8.9Score128Shelves
33. 33 传 Undertale: The Slaughter Cycle 传说之下：杀戮轮回 True Lord of the Wonderful Way妙道真君Anime Fanfiction693k WordsOngoing (AU setting changed.) After staying up all night and suddenly dying, Lin Fan transmigrates into the Underfell fan game he designed, Underfell: Kill or Be Killed. Facing the mad monsters he created, Lin Fan's only way out is to follow the game's route and leave the Underground... 55Reads—Score—Shelves
34. 34 暮 The Fall of Twilight: Beneath the Aurora 暮色之陨：极光之下 Shenggezk笙歌zkAnime Fanfiction248k WordsOngoing Maybe... if the war had never broken out back then, we would have had better lives. When the aurora blankets the world and monsters endure their days in pain, who will step forward to change everything? No... It's all in vain. When the last bit of warmth vanishes from the midst of malice, revenge can no longer be held back. With golden light by their side, is it a blessing or an ill omen? And behind the or 105Reads—Score—Shelves
35. 35 传 Undertale: Infection and Redemption 传说之下：感染与救赎 Worried Sick担惊受帕Anime Fanfiction394k WordsOngoing (Adapted from Plague Inc. and Undertale: Infection and Redemption) The end of the pacifist route, the beginning of a new life. Interests clash, and even the innocent are not entirely innocent. The epidemic strikes again. Who can stay out of it? With lives on the line, who harbors ulterior motives? "Some things can't be explained by science, just like monsters." Let it all be a long dream. A friend passes away, how tragic. The savior's sigh, how despairing. Why not take this chance to meet once m 35Reads—Score—Shelves
36. 36 U Undergoodluck LuckyFlowerAnime Fanfiction148k WordsCompleted [Undertale fanfiction] [Amateur writing (._.)] [No System] [The main cast are all native AU characters] [Any resemblance is purely coincidental] A human child named Clover falls into the Underground. Lucky Clover survives the fall and begins a strange and wonderful adventure through this bizarre place... After exploring the Underground comes a journey through the multiverse. Our AU has no ending!! Main cast: my original character Luck Sans, my OC Clover, and Dust! 65Reads—Score—Shelves
37. 37 M Murder, the One Who Carries Out the World's Will Murder，践行世界意志之人 oirAnime Fanfiction148k WordsOngoing [Anthropomorphism + System + Native, Not a Transmigrator; Undertale derivative, CP: Murder x Killer] … In the ceaseless cycle of reincarnation, who can remain untouched by endless repetition? Murder, born of Dusttale, was unexpectedly bound to a “System” at the end of a timeline. From then on, he was forced to travel through different times and spaces, helping the native Sans solve problems. After completing eighty-one missions, the plan to erase humanity would finally reach its conclusion! To d 17Reads6.7Score—Shelves

    Reader note

    This system isn't actually a legitimate system, and the rewards aren't particularly overpowered.

Other lists with Undertale: The Story of an ULB