Naruto System in One Piece - Chapter 415: Leiyin vs. Neji Hyuga

An alien spaceship invaded and unleashed terrifying monsters on Earth. The enigmatic invaders gave humans a chance to fight back with a system and classes, but John is stuck with the NTR Rogue class.Now John's only way of getting stronger is by completing tasks related to stealing other men's women. John's life had been a cruel joke, and this new apocalyptic world might just be what he needed.----This is a “netori” story where John, the main character, steals women from others. There is no NTR towards John.Check the Discord server for illustrations: The link is at the bottom of the first chapter. Removed from here because of bots.

The happiest thing in the world is to be able to amend what you have done wrong. She who acted willfully because of a game, was reincarnated into a time when she still had her parents’ love.

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.

Yang Qizhou unexpectedly obtained a text-based role-playing game called 【Deceit World】 and discovered that the rewards he received in the game could be brought into reality, and various bizarre events also began to unfold in the real world.In the era of ancient earth, ancient god sacrifices, the return of the old gods, strangeness rises, horror rampages, the unknown and the mysterious coexist, distortion and evil thrive, the sun cannot be directly viewed, the night cannot last long, dreams involve calamity, and the river of death holds terror... This is an era where even deities can fall, and even the sky can decay.Yang Qizhou obtained the 'Blasphemous Dark Crow' and, relying on the ability to restart fate, embarked on the path to become the 'Master of Blasphemy'.