Ichiban Ushiro no Daimaou - Volume 7, Prologue

Mark is a genius military weapon designer who was kidnapped by a mafia gang after refusing to work for them.
They forced him to design unique weapons for five years, until one day he successfully escaped only to get shot by his trusted comrades.
*Ding! You awakened a weapon system.
When he opened his eyes, he was in a different body and in a different world.
"You want to kill a wild boar without being detected? Forget about bow and arrow. Here, I present you this sniper rifle."
"You want to kill a horde of goblins from the sky? Forget about those flying carpets and brooms. Here, I present you the fighter jet."
"You want to kill a dragon? Forget about taking the help of the S-class adventure team. Here, I present you a nuclear bomb."
Join Mark Spencer/ Lu Zhen as he brings the whole world to its knees with the help of his weapon system.
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Note: Author isn't born in an English-speaking nation and has no editor either. So, please be understanding if there are any grammatical errors.
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The summer of 2006 was very hot. Chen Yang, who had just graduated, decided to borrow a sum of money first to make his future different.

- Description from novelbuddy

The strongest doesn’t need cheats.

Haruka, a high schooler who spends his life as a “loner,” is suddenly summoned to another world with his classmates.

Noticing the god in front of him, Haruka was going to get cheat abilities by picking what he wanted from the skill list so that he could live in the other world――or so he thought, but the skills were first come, first serve.

All the cheat skills were taken by my classmates?!

After not being able to get any amazing skills, Haruka’s “loner” skill made him unable to join any parties. Even in another world, he’ll adventure in solitude.

Haruka, recognizing the crisis of his classmates, decided to secretly help them out while not relying on cheats. He’ll surpass cheats as he walks the path of the strongest――.

Let the curtains raise for the tale about the strongest loner’s attack on the different world!

Aomori, who has a monster-fighting system, came to the world of One-Punch Man and gained the ability to enter various instances.

Therefore, “Founder of the Hero Association”, “NO. “And other titles fell on him one after another.

Comprehensive flow, the main world One Punch Man.

Completed dungeons so far: Pokémon – Demon Slayer – Sword – Pokémon – Digimon – Spell Return – Yokai Comprehensive World (Girls that Noragami Inuyasha can see, etc.) – Pokémon – One Piece-re0-Dragon Ball wait.

- Description from novelbuddy