Tunnel Rat - Chapter 374: The Two Keyboard Solution

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.

[Warning! The MC here is the literal incarnation of evil and madness throughout the story.]Valtar Titanblood formerly known as Ethan Martin on Earth was struck by an unimaginable tragedy and took his own life at the end, his whole life filled with misery and incompetence of his own doing.Then he transmigrates to a world of infinite proportions and power that defies logic, this new world which is filled with Dragons, Titans, Ouroboros, and countless more bloodline creatures and mythical beings, also powerful humans who are known as Mystic roams here as well.Valtar in this new world has the Karma System and the bloodline of an unknown titan running through his veins, with these powers in hand he who was supposed to become the symbol of justice and equality decided to become the paragon of madness and evil.He who had the tools to become the Judge of Truth and the figure of Respect chose to become the arbiter of chaos and the embodiment of fear.

Entering the mortal world for a hundred generations, do not compete for the youth of one life, but only for the day and night of a hundred generations.

Seeking immortals in the world of mortals.

My name is Li Qing. I have escaped from the mortal world in the third life, entered the Tao in the ninth life, and become immortal in the hundredth life.

(longevity stream, non-simulator, non-reincarnation rebirth)

(Bai Shi Shou Yuan, One Life Life)

- Description from novelbuddy

Su Xiaoxiu failed the college entrance exam and was admitted to a private university instead. Looking at the expensive tuition bill, her whole family was worried about how to pay for it. Should she take a gap year and retake the exam?

Just then, she suddenly got a progress system that gave her money every time she walked somewhere?! Looking at the large amount of money in the system, she was determined to improve herself and contribute something useful to society.