The Young Master I Carefully Raised Became Obsessive - Chapter 16

This is a story about the protagonist getting the system, going crazy in the biochemical apocalypse, producing aircraft and tanks, destroying zombies, saving good people and killing bad people.

- Description from novelbuddy

Liu Yan, an ordinary office worker from Earth, unexpectedly traveled to a strange world.

The heroes of the ages are on the side, embarking on a journey to conquer the heavens.

- Description from novelbuddy

A skilled but unfortunate modern-day assassin was killed in a freak accident. However, he soon found himself summoned to another world by an evil wizard, who had him possess the body of a boy as an experiment. After successfully planning the evil wizard’s downfall, he used the wizard’s body as a springboard to gain influence and power in his new world.

- Description from Novelupdates

“I was created to rule the stars. Instead, I was sealed away and forgotten. Now, it is time for those who sealed me to fear me once more.”__Born of futuristic technology, as well as a part of a god’s powers, Nova was the ultimate life form made by the richest couple in the universe to take over their empire. But due to seeds of betrayal, he was not only sealed away before he could awaken his potential, but everything that was his was also stolen by those thieves.Hundred years later, Nova wakes up when his mother ship gets raided and his pot is extracted to be sold. He awakens with a vengeance, and a mission to reclaim everything that was promised to him.This is his story of conquest, revenge and to tell the world that he is back. And this time, he won’t let anyone else take anything away from him.A hundred years might have passed, but his vengeance still burns bright.__r18 is mainly gore...and MC's tendencies. You have been warned. Harem and Romance will be slow since the MC has other priorities in life.. No Yuri, no NTR. But there will be a lot of catfighting between female characters for MC's attention.