Beginning of Cultivation - Chapter 51: Arriving at the Royal Palace

When Simon dies, it turns out there's more to combat than lightning reflexes with his controller, and the path to becoming a hero is more brutal than he can imagine as he descends into The Pit. Death after Death is a dark, time loop/Isesaki story with roguelike elements, that explores some of the common tropes in a different light.

Si Shuo didn't get a compatible heart in time, but instead received the More Children, More Blessings System and was sent to the Beast World Continent.She is a mutated, blue-eyed, white-furred female Cat Beast with a congenital hearing impairment. Her fertility was even stripped away by her Mother and given to her older sister. She is now facing the crisis of not finding a mate and being sent to the female cave!System: Congratulations, Host, for obtaining a special-grade fertile constitution that surpasses even a Female Saint... Congratulations, Host, for obtaining the life-infused Wood Element Ability... Congratulations, Host, for obtaining a shared growth space... Congratulations, Host, for obtaining the Nine Lives Cat destiny, which can be inherited by your offspring.From then on, she began living a cozy life with a husband, children, and a warm home...

Countless dimensional worlds appeared, and human beings began to practice.

Open the gene lock, break the shackles of the human body, absorb the gene core of the alien animal, and extract the skills or talents in it.

Warrior, Mage, Archer, Assassin, Support.

“What is your job?”

Yuan Bei shivered while holding the self-made cheating system.

“I’m assisting, with hard control…”

This is the story of a hard-charging assistant spreading positive energy in the world.

- Description from novelbuddy

A scientific genius named Thomas Harrier was transmigrated to an imperial prince body after a car accident that took his life. He found out that he is in a world similar to our own with a timeline akin to early twentieth century. The body that he is occupying was the imperial prince of a failing empire who suddenly rose to power after a successful assassination attempt of his father. Unaware that the attack is just the beginning of what is to come. He faces many challenges throughout. Will Thomas Harrier be able to live his second life in peace while running an empire and getting it back to its former glory? Or will he succumb into a conspiracy lurking within the country's borders?

Expect some:

Cold war era techs.

Super battleship with advanced electronics, propulsion, and fire control systems?
Helicopters?
Missiles?
Modern medicines and equipment?
AC-130?
A nuke?
Challenger or Abrams or Leopard?
F-4 Phantom or MIG-21?
Colored TV's.

Everything!!!

PS. Cover not mine, I just found it on google.