Mistress Of The Evil Forest - Case 132: Survival game: Nuf, the Gamemaster.

Before going to college, an ordinary high school student went to celebrate and got drunk. When he woke up, he found himself in a completely different world. There was a big sect, the approaching sect entrance examination, a slum where his body’s previous owner lived, and a shared memory about a missing young girl.

When he got tangled in a fight with a few punks in this different world, he fell off a cliff and miraculously found himself still alive, with two more voices ringing inside his head. They were Sword Master and Saber Master. In the company of them, he continued to find out more about this whole new world. He took the sect entrance examination, entered the sect, met a strange man in black, and even participated in a major competition of the sect to have a chance to win over his peers!
In this whole new world, he was born again and got to explore the fantastic martial world!

- Description from Novelupdates

This was the era of worldwide auto transformation!At the age of eighteen, everyone could awaken their autos and become auto men!Some awakened off-road vehicles, some awakened sports cars, and some awakened bicycles!By defeating the steel beasts and mechanical abyss monsters, unlocking achievements, and completing missions, one could earn point rewards to purchase various accessories such as firepower, armor, energy, and power cores!Xu Gu transmigrated here and started off by awakening an S-class heavy truck! Unexpectedly, he even had an additional binding to the Ultimate Enhancement System.[S-class heavy truck] got enhanced and became [SSS-class Leader, Optimus]![S-class liquid hydrogen energy core] got enhanced and became [SSS-class portable hydrogen fusion energy core]![SS-class defense force field] got enhanced and became [God-level Supreme Domain]![SSS-class photon pulse cannon] got enhanced and became [Super God-level Annihilator Cannon]!Starting with the Ultimate Enhancement System, with the body of an auto man, Xu Gu conquered the world, dominated countless realms, and proved his invincibility!

Avo was born to destroy New Vultun. In a twist of fate, he’ll become its only hope for salvation. The gods were the enemy. The slaver. The chains. With dreams of paradise, humanity slaughtered them and stole their powers, opening the path to become more – to ascend. Instead, they nearly destroyed the world. Vast hive cities serve as the final bastions against the crumbling of reality. New Vultun is the greatest of them all, and within its borders, ascenders wage war to determine the laws of existence itself. The world descends ever deeper into ruination. Avo was born a weapon, a slave to his instincts and his masters. He and his brothers were made to burn New Vultun to ashes. Everything changes when Avo gains immortality and becomes heir to an impossible legacy. He must ascend the megacity of New Vultun. He must challenge the very tyrants that usurped the gods. He must finally free the world from chains.

Akira, was born in the slum and wishes to get out but the only way he could was to risk his life in these ruins as a hunter.