The Overlord of Blood and Iron (WN) - Chapter 300

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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When a young woman is killed in a traffic accident on her way home from work at a tax bureau, she suddenly finds herself transported to the world of the otome game she was playing the night before – but instead of the heroine, she’s been reincarnated as the bad guy! Using her knowledge of the game, “Iris” manages to avert personal disaster and decides to rebuild her life with her modern-day economic know-how. This is one mean girl who isn’t going to let her perceived reputation stop her from being a heroine!

It has been a year since Li Fuchen lost his “talent”. Now he lives the life of a wastrel, being bullied and beaten by those who were once inferior to him. However, he has still not lost everything as he is engaged to a strong and pretty girl of a powerful family… but that came to an end as the engagement was abruptly anulled. With shame brought to the family and his life engulfed by darkness, a ray of hope pierced through the sky.

Li Hao: What? Someone jailbreak? Huh? Why is there an exclamation mark on the reward notice?

[Click on this reward notice to get the location information of the jailbreaker~]

Li Hao: There is an exclamation mark on this scratch pad?

[Scratch this card and you will win a prize, don’t miss it~]

Li Hao: There is actually a question mark on this box of pills?

[This is a box of life-saving pills, which can save the life of an old man. The host can receive the task and go to a fixed location… and you will get an unexpected surprise~ Do you want to receive the task? Yes! no! 】

Li Hao: Can you still receive the mission? Eh…that person also has an exclamation point? Huh? This dog actually has hints~

[Ding dong, congratulations to the host, for completing the task, you will be rewarded with a villa worth tens of millions…]

[Ding dong, congratulations to the host, complete the task, reward a Bugatti Veyron…]

- Description from novelbuddy