Warring States Survival Guide - Chapter 149 - 97: The Top 10 Transmigrator Disgraces of the 21st Century

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.

After traveling for three years, Lin Yu was drawn into a horror game unexpectedly.

However, he discovered one thing.

The dungeon boss feared by countless players turned out to be the little loli who called her big brother next door.

then.

In the horror hospital, the director of the hospital turned out to be the uncle downstairs who made him and his granddaughter fall in love.

In the bloody slaughterhouse, the existence known as the bloody butcher turned out to be the uncle upstairs who wanted him to be his brother-in-law.

In Changteng Ghost School, the woman who frightens countless students is actually the long-legged sister Yu who invites her to her house for dinner whenever she has nothing to do.

…

Traveling through three years, you told me that this place is actually a horror game world?

(Introduction is weak, please read the text)

- Description from novelbuddy

In a world where the strong prey on the weak and nobles slaughter commoners like insects, Alex was just a weak boy who lost everything to the cruelty of fate.For the sake of revenge, he rose from the ashes, determined to carve his path through a world soaked in blood and betrayal.But there is something the world does not know—something even Alex himself has yet to discover...A power buried deep within his blood, ancient and untamed, waiting to awaken.

Reincarnated in a magical world with INTERNET POWER?Nolan, a failed teacher, dies and wakes up in a ruined fantasy world—in the body of a Mana Specialist—a magic instructor who helps wizards and knights control the dangerous, corrupted mana flowing through their realm.The problem?The body’s former owner made a deadly pact with a succubus and was hunted by his noble family. Worse still, Nolan doesn’t know a single thing about being a magic specialist that could’ve helped him tremendously in his troubled situation.Just when he thought all hope was lost, Nolan gains access to the Internet. Not just Earth’s version, but this magical world’s version too.Need a face slap? Buy an internet promo to gain access to the knowledge wherever he needs.Succubus problem and strengthening up? Play inside the game and get stronger in real life too.Sometimes, to solve magical problems, all you need to do is browse.