I Became A Third-Rate Villain In The Hero Academy - Chapter 7: Unhappy Time with an Orc

The world-class online game launched by the United Nations in 2020, Tianlin, is officially launched at the same time in all countries of the world.

Su Ye was born again from 2025 to 2020, and he kept all the main developments in the past five years.

What? You only have a black iron weapon, I have a bronze suit.
What? The gold level of your pet, sorry, my god is a pet!
What? A bottle of pharmacy 1 gold coin is too expensive, the boss gave me ten barrels!

Su Ye Li Zhi: Since you are born again, you have to be the strongest player!

- Description from uukanshu (translated)

A mecha otaku is reincarnated into another world as Ernesti Echevalier (Eru). In this world there exist huge humanoid weapons known as Silhouette Knight. Dreaming of piloting those robots, Eru, with childhood friends, Archid Walter and Adeltrud Walter: together they will aim to become a Knight Runner, pilot of Silhoutte Knight.

Abigail’s only crime in life was being born as the mute daughter of the deceptive maid, who drugged her boss and got pregnant for him… or so she thought.All her life she had to serve her stepsister, Genevieve, attending to her every whim. While Genevieve used every opportunity she got to make Abigail’s life hell, even to the point of seducing Abigail’s boyfriend.On the night she resumes college, Abigail crosses path with Jamal Jonas, a heartbroken elusive billionaire, who leaves behind a stuffed animal that belonged to his first love. Abigail keeps the stuffed animal, which stirs her long lost memories.Five years later, Jamal shows up again, but this time as Genevieve's new live-in driver.Working for Genevieve quickly places him near the supposedly mute and intelligent Abigail who he doesn’t immediately recognize, and soon enough, Jamal finds himself pulled in by Abigail's charms.Jamal quickly realizes there is more to her than meets the eye, and there might be more connecting Abigail to his first love than Genevieve.

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.