Gimai Seikatsu - Days With My Step Sister - Chapter 30 - 5

After living in a desolate land, where there wasn’t even a single blade of grass and hunger was an everyday reality, Min Sung finally returns to Earth: his home.

Lu Yao stumbled upon a pixel art game where players take on the role of a God in it, but it didn’t take him long to realize that this game connects players to the many worlds of different dimensions.The [Sacrifice] function in the game will actually allow offered sacrifices to enter his reality, while the [Blessing] function makes it possible for him to offer real life objects into the game.As a Novice God, besides from creating all kinds of natural disasters, he really couldn’t do much in the game.That was until he decided to ignore the cost and reincarnate a beautiful apostle, from then on, the whole gameplay started to change…

A door unfolded before him.Evil thrived, and whispers spilled from within.The resentful compound eyes flickered and vanished, the presence longing to burst out was blocked inside, and the alluring murmurs echoed in the ear.The sticky, pink brain mumbled something. A figure cloaked in a yellow robe watched from a distance. A dark green presence, smelling of blood, roared. A string of wondrous soap bubbles released friendliness—and many, many guests.They sincerely invited Lu Li to join this mad party.Lu Li stepped in, his stride resolute and unwavering.He had no reason to refuse.

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.