The Reincarnated Assassin is a Genius Swordsman - Chapter 467

One day, a handsome young man died in a car accident. He suddenly wakes up and find himself in an unfamiliar place, but what surprised him most is that he is taking over someone else’s body.

Many strange phenomena have been happening in Yin City. Li Ang—whose alias is Li Risheng—becomes embroiled in an absolute real game of life-and-death, known as Killing Field.Using his above average analytical and deductive skills, he completes different quests assigned by the system, such as eliminating supernatural beings or solving cases, while trying to unravel the true nature of the game.

Zhou Yu, a reclusive otaku, who did not like to go out of his house, was one day forced out of his house by a series of unexpected events.

- Description from Novelupdates

A broken man who ended his own life finds himself reincarnated into the game he used to play. However, instead of becoming the protagonist or a powerful antagonist, fate places him in the role of a minor villain—a mere stepping stone for the protagonist in the game's first arc.