Monster Synthesis Master - Chapter 57

Chi Xiaochi: fourth-rate citizen at birth, three-time award-winning film emperor, second-rate temper, first-class looks. He crawled his way out of hell on hard mode to become a winner at life.

Then, he was smashed into a vegetative state by a chandelier.

061: Hello, here’s a brief rundown on the scum gong reconditioning system. This system measures the regret level of the scum gong. Every time their regret level reaches one hundred points, you will be able to leave the current world. A friendly tip, usually, through dedication and self-sacrifice, our employees slowly foster a sense of dependency in the scum gongs, gradually making it so the scum gongs can’t live without them.

Chi Xiaochi: How many regret points is a complete loss of reputation and standing worth? How about a fall from grace? Or wanting something but never being able to obtain it?

061: ……

- 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.

David Drinkwater lived his entire career as football's biggest joke.Thirty seven years old, rejected by every major club, and called a “club whore” by fans across Europe, but at Wembley Stadium, in the rain, he finally proved them wrong.Championship playoff final between Millwall and Norwich, and in the 90th minute, he scored the winning goal, then he died.**[Ding. Ding.]****「Host found: David Drinkwater.」****「Synchronisation complete.」**He opens his eyes in an eighteen year old body.Demien Walter, a failed Fiorentina academy prospect and suicide attempt survivor with an overall rating of 48, no team, and no future, but David brought something impossible with him.**[Ding.]****「Ultimate Gacha System activated.」****「Mission: Rise from nothing. Become the greatest footballer in history.」**Training earns points while matches earn rewards, and achievements unlock legendary packs.Every pack opening could change everything, whether through common stat boosts, rare techniques, or epic abilities, yet there's always the ultimate prize.**[Ding.]****「Diamond Pack opened.」****「Congratulations. Andrea Pirlo — Regista Vision obtained. Passing +15. Vision +10. Legendary Trait unlocked: Deep-Lying Playmaker.」**From trialist to conquering the football world, every pack, every point, and every impossible moment building toward football immortality.They called him a failure once, and they called him wasted potential, but now, with forty years of wisdom in an eighteen year old body and a system that rewards every drop of sweat with power, David will rewrite football history.One pack at a time.**Some dreams get a second chance, and some legends get a second life, so this is his.**

Uchiha Kai has been cautious since he came to this world. He vowed that he must be cautious and go to the end.

But one day he received a mission – to cover the wave wind team to blow up the Kamabashi Bridge, Uchiha Kai knew that he was going to be unlucky…

- Description from novelbuddy