Unsheathed - Chapter 386 (2): Another Spring

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

In the far future humanity is threatened by monstrous beings called kaiju now humans have expanded across the galaxy with the development of new techniques and fleets of mechs.Alto a young boy with dreams of becoming a great mech pilot is forced to be a mech designer. He finds a strange technology that opens his eyes to the vast secrets of the galaxy, now with a new purpose Alto must become something the world has never seen before.A/N: Just wanna do a good sci-fi book

Read at least six chapters, then prepare to crave the rest.The main character will show up in Chapter Five, though I don't recommend skipping the first four chapters.-----The world was celebrating. The Demon King was dead, along with his Darkness Generals.Humans led the other races to war for subjugation. They killed all, and none were spared. However, thousands of years before this happened, a piece of history was altered by time itself. In fact, the Demon King didn't have four generals but only one, which he sealed and sent into eternal slumber. Just as he started to close his eyes, the chains locked away for eternity shattered into pieces.

The Pseudo-Holy Grail War of Snowfield is About to Begin!Moran, who has transmigrated into the Type-Moon universe, is determined to clear the game in one life!Waiting online, urgent!Ding! You have successfully activated the Life Simulator!• 【You drove out the foreign Olympian Machine Gods, took the hand of the Earth Mother Goddess, and founded a new nation and mythology.】• 【You are the Lord of the Millennium Castle, bestowed with the name Brunestud, and the beloved ruler of the land in the eyes of the Crimson Moon.】• 【You are the Final King of the Age of Gods, single-handedly preventing its decline and ensuring that Divine Age Britain endures to this day.】Behind this dazzling simulated life, Moran now faces—Arcueid: “Weren’t you supposed to pick me up at the Millennium Castle? Why are you here in the Holy Grail War?!”Artoria: “Enough! Come back to Britain with me!”Ereshkigal: “Moran! Who are all these women?!”As his ever-growing circle of admirers closes in, Moran realizes—This might just be the hardest “Kidney Grail War” in history.