Damn, I Awakened With A Horror System! - Chapter 52: Achieving Foundation Realm.

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.

~Mature Content~A guy living his boring life as he play games on his pc. He loves to play erotics and adult games, and one day because of some random draw or something he was chosen as ‘Beta Player/Tester’ for the game.without any hesitation in his mind he sign the form he got in his email and in few days he got the VR Capsule for the beta testing.Of couse he didn’t have to pay for anything, and will get the chance to play an adult game first time in a VR.[You have Entered the Game!][Please Enter Your Login Details!]-Username: *******--Password : *******-[Thank You For Login!]-_-_-_-_-_-_-_-_-[All the characters in the novel that will appear will all be of the age of 18 or above]

Unexpectedly arriving in a world where humans and Pokémon coexist in harmony, Natsume inherits an abandoned farm.With Pidgey soaring through the skies and Heracross resting under the shade of trees, the world’s vivid reality unfolds before him.But instead of aspiring to become a Pokémon Trainer, Natsume seems more inclined to embrace the life of a farmer.Natsume: “It’s decided. From today on, I’ll be a farmer.”However, as time goes on, Natsume starts to realize that his goals may have shifted just a little.“Champion Natsume, are you saying you originally just wanted to be a farmer?” a reporter asks earnestly.Natsume: “Would you believe me if I said it wasn’t entirely my choice?”

Eira Hax, the daughter of a once-wealthy heiress, has spent her entire life in the shadows.Twenty-two years ago, her mother, a kind-hearted but naive woman, was deceived by her husband, a ruthless businessman. He stole her entire fortune and framed her for a crime, sending her to prison, unaware that she was pregnant and secretly battling terminal cancer.Eira’s mother died alone behind bars, but not before giving birth to Eira, entrusting her with a burning desire for revenge.Now, two decades later, Eira returns with one goal: to destroy the man who ruined her mother’s life—her own father.To do so, she strategically marries his most powerful rival, Callian Reed, a man as dangerous as he is influential. Together, they plot to destroy her father’s empire, piece by piece.But as Eira is pulled deeper into a world of business, power and revenge, she’s forced to confront her own problems and decide just how far she’s willing to go to avenge her mother.“I’m not your enemy, darling…you should know that by now.”“Callian, everything you do is not written in our contract. Why are you breaking it?”“The more I learn about you, the more I hate everyone who hurt you. So please, Eira, let me get rid of them for you.”