I Signed-In For A Billion Dollar Mansion From The Very Beginning - Chapter 470 - Breaking Record! Another

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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Lu Zhiguang is not a cannon fodder himself, but his mission is to save the miserable cannon fodder.

When Xu Ying woke up in the post-apocalyptic world, she found herself back at eighteen years old in her previous life!Luckily, her portable space was filled with spoils from raiding supermarkets, including clothing, food, shelter, and various weapons and medicines.This made Xu Ying ecstatic.In an era of scarce resources and poverty, she had enough to ensure her family lived a good life.While other families favored sons over daughters, Xu's family had always cherished Xu Ying as their precious jewel. Having squandered a good hand in her previous life, she was determined to do better this time by kicking scumbags to the curb and tearing down the 'green tea' women, all while protecting her family and incidentally snagging the toughest man in the village!Huo Chen had a solitary nature and fearsome appearance, causing children to cry at the sight of him, but Xu Ying, who had honed her skills during the apocalypse, was not afraid of the notoriously fierce man at all.Xu Ying: What do you want to do? We're just partners.Huo Chen: You think you can seduce me and then run? No way.

“There are no heroes. In life, the monsters win.”

...

In 2106, [Mayhem Online], a fully immersive VRMMO game, was released. Soon, it dominated the world's economy when people could exchange the in-game currency with real-life currency and vice versa.

In the year 2107, Flynn Grey, a 22-year-old college dropout with an ambiguous history, joined in the fray of billions of people that had already started playing [Mayhem]. Hoping to uncover the game's secret and earn a fortune, he spent months on adventures without fruitful results.

For better or worse, Shura, Flynn's in-game character, ends up in a great Wyvern's den, acquiring a hidden class and a monstrous race. Join him as he defeats his past and paves his way into becoming a true legend in both worlds.