Super God-Level Top Student - Chapter 865 - 325: Those Who Go Will Go, Those Who Come Will Come_2

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.

Ascension of the Hollow Star

Linky transmigrated to the Magical Land and became the third young master of a noble family. Just when he thought it was time for him to enjoy a life of luxury.

He was sent out for the family’s tribulation, and had to set off to the “Land of Death”

— Black Wind Castle! Here, dark elves, frenzied orcs, and blood-thirsty dragons were regular occurrences! Everyone thought that Linky would surely die, and had even prepared to collect his body.

But just then, Linky awakened the [Super Gourmet System]. As such, things changed.

The Elf Queen loved his fruit salad, while the Orc Saint couldn’t get enough of his grilled steak. The Sorcerer of the Holy Palace couldn’t live a day without the “Linky Brand” whiskey.

Even the Vampire Prince Nikolas would sacrifice anything to get a long-term order of Linky’s fresh blood coffee.

Until one day, when a gargantuan dragon that blocked out the skies came to his door…

Perhaps it is the choice of fate. As a senior otaku, Qian Lingfeng got the “steel shell system”. However, when he swept the world with the system, became a local rich man, made all kinds of beautiful women, opened a harem, and realized the ultimate fantasy of thousands of otaku, he found that things seemed far from simple!
When the end comes, biochemical zombies suddenly come down, fierce beasts are in power, bloodthirsty zerg roam to kill the world, and human lives are comparable to dirt. Where will weak human beings go in this world? Is humanity going to be extinct? Or … can an otaku save the fate of the human race?

- Description from Novelupdates