I Was a Sword When I Reincarnated (WN) - Chapter 5: Rank up!

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.

It all started when the protagonist downloaded a game called “The Fool (Beta Version),” marking a pivotal shift in the style of his life. This was no ordinary game; it lacked visuals and music, composed solely of lines of text and a multitude of choices. Yet, each decision within the game had the power to alter the player's destiny, for on the other side of the game lay a real, unknown world.Players were unable to physically enter this otherworld or see its landscapes, experiencing the alternate realm solely through text, vicariously living each step of their character's journey.As the game progressed, not only could rewards from the game materialize in the real world, but creatures from the game began to appear in reality as well.Then came the day the game was released for global public testing.An era quietly unfolded, where the masses embarked on explorations and treasure hunts in an alternate universe through 'textual adventure,' heralding a new chapter of engagement and discovery.

“Did you think healing me would make me love you more?” He scoffed grabbing my hair as he pulled me towards the door.“You're hurting me, Xavier,” I cried beating against him weakly. There was not much I could do.“If I ever see you an inch close to me,” He threw me against the wall “I'll damn the consequences and kill you,”.***My mate and I were destined to hate each other, only an act of true love or selflessness from the stronger mate could set our destines on the right path but for seven years, I had to put up with my mate's abuse and his supposed love of his life until one day I decided to leave.I left, determined to stay hidden from him forever... but I found out I was pregnant few weeks later.

The archaeologist “red-haired witch” made too big of a disturbance while excavating tombs, gloriously becoming a martyr in the midst of the grave chamber’s collapse. Seventeen years later, she had transmigrated into the Five Regions Continent. The delinquent Meng Fuyao who struggled to survive in the lowest rungs of society, cast aside her boyfriend who was about to marry another person with a slice of his five fingers.

“Believe me, she will be an absolutely perfect wife. With her by your side, you will be like an aristocrat and her luxury poodle – no matter where you go, your status will increase by a hundred-fold and complement each other perfectly.”

Forsaken love, abandoned like dog shit. From then on it was a boundless sky and open sea, a trek of ten thousand li. To obtain the Seven States seals, fight against the world first. For the hope of return in her heart, brazenly collide with the Machiavellian royalty of the seven states, uniting the outstanding and talented under the heavens through fortuitous meetings.

And so, will this road of chanced affection go through the peak of heavenly mountains and the warmth of bonfires; the glint of sword shadows and the coldness of the glance backwards; the autumn sun’s golden wind and the flying sweep of the robe sleeve; or that chilly moonlit forest and that sprint like an arrow’s? Once love and that chosen, narrow path cross each other, which will prevail?

She said, I can dedicate myself to you, but if you do not want my body of hot blood, then I must draw your blood. She said, the efforts of my entire life have run in the opposite direction of true love, so are the heavens laughing at me? Then I guess I can only laugh at the heavens.

Three chi of torn silk, one zhang of spilt blood. A thousand li of expanded territory, ten thousand fallen corpses. One day the Luan and Phoenix will soar up with the winds, and Fuyao will rise straight up, ninety thousand li.

- Description from Novelupdates