The Hero King, Reincarnate to Master the Art of War ~And Thus, I Became The Strongest Knight Disciple (♀) in The World~ - Chapter 352: 16 Year Old Inglis and The Meaning of Matchmaking (4)

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

Feng Yun was an ordinary young man who was unable to cultivate. One day, He got the inheritance of the Ancient Yang Demon Clan and a mysterious sword. With these he became a super genius and started his new journey from a small town to heaven, sweeping across the world, vying for the supreme existence.

____this story sets in Japan that developed a little different history from yours.

This is how a Japanese Princess relieves her stress of the day by using the latest VRMMORPG, and while playing the villain there, the first town turns into whirlpool of chaos, smashed the underground organization in one hand and went for a coup. It’s literally a playtime diary of a girl who is called as “Genocider-san”, “Roaming Last Boss”, “A different person plays the game”, “Raid Boss”, “Ruthless”, “Calamity”, and such by the players.