MMORPG: Rise of the Peerless Pumpkinmancer - Chapter 294: Rats! Lots of Rats!!!

Perhaps it is the choice of fate. As a senior otaku, Qian Lingfeng got the “steel shell system”. However, when he swept the world with the system, became a local rich man, made all kinds of beautiful women, opened a harem, and realized the ultimate fantasy of thousands of otaku, he found that things seemed far from simple!
When the end comes, biochemical zombies suddenly come down, fierce beasts are in power, bloodthirsty zerg roam to kill the world, and human lives are comparable to dirt. Where will weak human beings go in this world? Is humanity going to be extinct? Or … can an otaku save the fate of the human race?

- Description from Novelupdates

"What you do in life, Echoes in Eternity."

The System, who goes by the code name, Thirteen, defied the System God in order to give his previous Hosts’ the chance to change their Fates.

Unfortunately, he was killed by his Father, the System God, and was sent to the world of Pangea to struggle like the Cannon Fodders that he fought so hard to protect.

Armed with his knowledge as a System, Thirteen vowed to change not only his Fate, but the Fate of others whose destinies were tied up with him.

In a world torn by power and corruption, a fallen System will bring out a symphony of change, or lead it to its destruction.

Megumi Fujiboma, a boy who met an untimely end, awakens to find himself reincarnated as the head of the prestigious Fujiboma household, a branch family of the revered Boma clan.From the moment of his birth, everyone eagerly anticipated the growth of this remarkable heir. However, their enthusiasm quickly faded when Megumi was revealed to lack external abilities, and was declared unfit to become an exorcist—one of those destined to drive the world away from darkness.Yet, Megumi was not one to be easily defeated. He possessed a powerful binding system that equipped him to transform his circumstances far sooner than expected.[Target successfully bound]********[Talent has successfully awakened: Grade One Fire Talent][Receiving tenfold the rewards]

This is an alternate history. Decades after the fall of the Eastern Jin Dynasty, the world is still in chaos, although there is hope for reunification.