MTL - Unemployed at the Beginning, I Let the Singer Come Back - Chapter 72 film adaptation

Xu Jun finally defeated the BOSS–the Dark Demon King, in this stand-alone, virtual reality game. When he wanted to go out to browse Weibo and express his mood, he suddenly encountered a game BUG and immediately passes over to the game world.

He became the man who finally took down the Great Demon King in this world. Gratifying! The attention of millions of people!

……However, he did not know the development of this world was not the same as the game, the Demon King did not die, rather his soul entered into Xu Jun’s body; this Demon King knows of all the stupid things Xu Jun does everyday…….

- Description from Novelupdates

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.

Chen Lun traveled to the year before the game’s public beta and became an NPC in the game world.

And so, a new version was born…

Steampunk, spooky things, churches, shelters, the sequence paths of the seven righteous gods…

He put on his black top hat and stood on top of the ruins.

Standing behind him are the villain bosses of various versions in the previous life, the dead nun Floyd, the bloody painter Noah, the sword fighter Antonio, the delusional clown Alex…

Chen Lun: “Player spawns monsters, I spawn players, this is in the Taihe River…”

…

Also known as “Rational Use of This Sustainable Resource Named Players”, “These BOSS are really strong but they are all my younger brothers”, “No way! So I can also become a god? ! “

- Description from novelbuddy

An orphaned boy with dreams of making it big through being a blacksmith is given a once in a lifetime chance to succeed when he's taken in by an odd pair - Eggor and Ella. While former teaches him the arts of craft, the latter teaches him the mysticism of cultivation, granting him two paths to tread in this life.