I opened a shop on the Astral Train - Chapter 53

“How can such an unscientific thing be possible?”“If it's true, wouldn't we be able to rule the world?”“You think so, don't you, Mr. Gin?”“By the way, could you please sign an autograph for me?”“Use your real name.”————Since the disappearance of high school detective Shinichi Kudo, the death rate in Beika City has been increasing.But it doesn't matter, Hayashi Yoshiki will take action.He will make the whole world keep up with Beika City's pace.

In a normal and average modern world where a prestigious academy nurtures elites in a certain field who are known as ”Supreme“ such as [Supreme Inventor], Allen Walker suffers from being called 'average'. Allen Walker can't accept why he has to be average when a few are fortunate to be born as either a genius or prodigy. After a week of self-loathing, when all of his hope was lost, a sound snap him back to reality, or is it insanity?

Ding!

[A suitable host has been found! Prodigy System at your service!]

Ding!

[Hello darling! Chuu~ Harem Protagonist System at your service! Or do you want my service in bed instead?]

Ding!

[A wild Anti-loner System has appeared!]

Ding!

[Fiction fanatic, praise thee and thou shalt be graced with the Multiverse Traveler System!]

Ding!

...

Before Allen can even choose a system, another too familiar sound harassed his ears.

Ding!

[For achieving a thousand system requests which are a one in a decillion chance to occur, a Supreme Being was forced to use Divine Intervention.]

[Merging all of the thousand systems to create the most versatile and advanced system... Merging complete! Alternate Multiverse Chat Group System has been obtained!]

After accepting the Alternate Multiverse Chat Group System, Allen becomes a prodigy and the Chat Group's Admin and has no choice but to chat with beings from other universes.

Beings with suspicious, delusional, and eccentric names such as [I Love Mathematics], [Lolicon Shota Cultivator With Soul Fetish], [Sword Forge From Chaos], [Self-Proclaimed Genius Goblin Hero], [Reality's Bitch], [Time Manipulator Of The Apocalypse], and [Delusional Modern World Chuunibyou]

The chat group introduces Allen as [Supreme Order] as he chats with the otherworldly beings to find out the secret behind the Alternate Multiverse Chat Group.

Jiang Li accidentally transmigrated to a fantasy world along with a game called Super Godly Machine Army.

[Ruler Panel]

[Ruler: Jiang Li]

[Game: Super Godly Machine Army]

[Interface: Military Units]

[Infantry Machine Unit], [Navy Machine Unit], [Air Force Machine Unit], [Space Machine Unit], [Special Forces Machine Unit]

[Energy Points: 0]

[Soul Sparks: 0]

Soon, Jiang Li created Combat Machine Soldiers, Electric Machine Soldiers, Liquid Metal Machine Soldiers, Machine Dragon Riders, Nether Energy Machine Soldiers, Machine Engineers and many more.

This was the story of a man in a fantasy world who became invincible by creating a machine army that dominated the world.

Perhaps it is the choice of fate. As a senior otaku, Qian Lingfeng got the “steel shell system”. However, when he swept the world with the system, became a local rich man, made all kinds of beautiful women, opened a harem, and realized the ultimate fantasy of thousands of otaku, he found that things seemed far from simple!
When the end comes, biochemical zombies suddenly come down, fierce beasts are in power, bloodthirsty zerg roam to kill the world, and human lives are comparable to dirt. Where will weak human beings go in this world? Is humanity going to be extinct? Or … can an otaku save the fate of the human race?

- Description from Novelupdates