Di Xiu transmigrated, becoming a gray rat in another world. Not only must he build a protective dungeon to safeguard himself and his race, but he must also constantly guard against invasions from other races. Humans, gods, demons, monsters, dragons, elves, ancient taboos... even outworld gods coveting the world! The former order crumbles, and the apocalypse topples the towers of civilization. In the face of life and death, Di Xiu comprehends the truth of magic. Magic is not chanting, but a rigorous set of underlying world protocols! Only with the correct logical framework can it be safely compiled and run. While other mages are still struggling to chant spells with their flesh and blood, Di Xiu is already debugging magic circuits in the dungeon, developing the third-generation gray rat exoskeleton armor, heavy armored mechs, and aerospace carriers... The magical industrial age has begun! The gray rats are building a jungle of steel and gears. Mechanical rats wield precision...

[Travel to Another World] + [System] + [Cultivation Through the Fetus] + [Fantasy] [Mine Warning: Not a thrilling story, with a slowly developing protagonist, a strong female lead, and no CP.] Sujana was in a car accident, but because she was bound to the system, she traveled to another world and became an unborn fetus. While still in the fetal stage, she began practicing techniques to absorb innate energy. Just when she thought her special physique would give her a head start, she was born prematurely, which thwarted her efforts and significantly reduced her special physique. As she aged and gained more cultivation, she discovered that this other world was vastly different from what the system had described. It was a world rife with beasts, and the cultivation methods were crude, far inferior to those given by the system. Shortly after Sujana began her cultivation, the system went dormant for unknown reasons, leaving her alone in this other world. As her cultivation level increased, Sujana discovered that the entire world was a vast mystery, and she was at the very bottom of it. Only by reaching the highest point could she see the truth. Will she finally discover the truth about the world?

Chen Mo has a secret: in his eyes, everything he wants to do is a quantifiable progress bar. Officials say: He is the nemesis of high-risk anomalies. The villains say: He demolished our base and stole the anomalies we contained. Chen Mo said: I was just forced by obsessive-compulsive disorder to push the progress to 100%. The so-called salvation is to reset the progress bar of despair in people's hearts to zero. - Chen Mo

Lin Xuan split into countless parts and transmigrated! Talents shared, skills shared, abilities shared! From now on, I won't eat beef!! But... Death Queen Island: Holy crap, are these beasts even human? Is this how Saint Seiya are trained? House of Evolution: Brothers, I can't feel my hands, help me! Wano Country on the Grand Line: What kind of idiot king is this?! Kamen Rider: Holy crap, Kamen Rider is chasing me! Kassel College: Thanks for the invitation, bloodline level rating E, waiting for the world to be destroyed. Type-Moon World: A gas explosion occurred in Fuyuki City during the Fourth Holy Grail War! Digimon: Evolution, evolution, and more fucking evolution!! Shrouding the Heavens: What this body and that body, eat my Great Universe. Super Limiter. Super Evolution. Denial of Nothingness. Fist

[100+] + [Pampered Darling] + [Daily Life] + [Scumbag Witch's Sweet Talk] + [Multiple Female Leads] [Not a Satisfying Story]

She is the richest witch, known as the lucky cat who controls wealth and brings good fortune.

She is the leader of the spirit cats in the dream world. The spirit cats can love any object, but they cannot love their leader.

She is a witch whom even succubi call succubi, and the object of fantasy for countless little witches at night.

She is still the witch who rises to rule all races, breaking through the turning point of the universe...

She is the Eternal Witch—"Amya Frederick"

Good news, I was killed by a train at home.

Even better news: he's become the navigator of the train.

Even better news is that you can travel to the world of anime by train.

What pioneering and interesting things did you do after becoming a navigator?

She was paired with Kirito.

Adopting Lolis from All Over the World

Discussing the relationship between monarch and subjects with a famous queen

The birth of the king was celebrated with a cannon salute; God was lured onto a train; and Shiori almost fell in love with him.

Do these count?

Worlds experienced: Sword Art Online, Black Bullet, Akame ga Kill!, Date A Live, High School DxD, Guilty Crown, Academy Battle, Accel World...

(P.S.: The world-building is mostly from older anime series, with fewer newer ones.)

Luo Yu travels to Runeterra, becoming Ryze's heir. He's tasked with gathering the world's runes. However, the true threat to this devastated world lies not in the runes themselves, but in the hearts of those twisted by them and fate... From the court intrigues of Demacia to the icy wars of the Freljord; from the neon shadows of Piltover to the spirits and warriors of Ionia... Luo Yu appears at every crucial plot point. He's Lux's trusted mentor, Jarvan IV's trusted strategist, and LeBlanc's hated troublemaker. Viego: "You're the twist, you've ruined all my plans!" Swain: "Luo Yu... who is he?" Luo Yu: "Don't ask. I'm just a passing bard whose hobby is saving the world and picking up runes."

Jiang Ci woke up as a stone on a riverbank in a Jiangnan water town. Unable to move or speak, he could only watch helplessly as the Immortal Sect recruited students, a flood of them streaming in. He thought his life as a stone was hopeless, relying on absorbing meager earth energy to survive eternity. Then, a mysterious yellow stone seal inexplicably appeared in his sea of ​​consciousness: [Stage: One] [Feature: Generate Wealth from the Earth (Autonomously Absorb the Energy of the Earth Spirit (Earth Veins))] This divine seal, which empowers one simply by lying down, arrived just in time! Even more amazingly, a blue-robed Taoist from the Daiyue Sect rolled up his sleeves and said, "I know you possess spiritual energy. Follow me back to the mountain." Wait! Are the Immortal Sect's admissions criteria so broad? Even stones are acceptable? From then on, the Daiyue Sect gained a disciple with a unique artistic style. Others fly with swords, but he... rolls? Others refine elixirs and draw talismans, but he... basks in the sun and absorbs earth energy? Watch how a stone, lying flat on its back, absorbs spiritual energy with the "Earth God" seal...

[Game invasion + strong female lead with no romantic partner + leveling up + clear-headed character + mystical elements + incredible luck]

Lan Qin was still at work when suddenly the world collapsed, and everyone was transported into a survival game.

I only brought a Bluetooth keyboard with me at the start, and I never expected that this keyboard could actually modify system rules.

Now she's immortal, and her luck has become exceptionally good.

She starts off with a huge, dilapidated Taoist temple, while others are still sleeping alone and miserable, the female protagonist already has a car, a house, and savings.

Later she realized just how useful good luck really was; wherever she went, NPCs would shower her with gifts.

She further discovered that the way this keyboard modifies rules is by beating up the system. No matter what kind of system it is, beating it up will make it behave!

Fellow Daoist, do you wish to cultivate immortality?

Fellow Daoist, I fear that in this era of universal cultivation, others will already be flying in the sky while you're chasing after them on your electric scooter.

Come play this survival game! Even complete beginners can become pros in no time.

Those who initially had a solid foundation suddenly became complete noobs after joining!

Come on, you can cultivate immortality, you can cultivate Buddhism, you can ride a horse, you can become a witch, you can cultivate whatever you want!