I'm an NPC! I Cheat and Slaughter Players Worldwide

[Gaming Metropolis + No Female Lead + Exploiting System Bugs + Dark, Horror-Inspired Style + Ruthless Protagonist + Do Not Read If You Want a Righteous, Saintly Hero]

This is a world controlled by games.

Everyone else gets to be a player. Why am I stuck as an NPC?

Twelve hours on guard duty every day, no days off all year, and a pitifully meager salary?

NPCs deserve to be exploited, with no chance to turn their lives around, is that it?

The System descends, and I launch the game in the wrong way!

I have no interest in being a player. I’m going to eat them!

[NPC advancement error: Hidden Boss “Predator.” Can plunder players’ class cores and character templates. Method of plunder: “Devouring”!]

(Player: Holy crap, did my account just disappear?)

[Assassin class-change error: “Lost One.” The character clips through objects and can’t be hit by any physical attack. Can pass through any obstacle!]

(Player: If you charge straight at people, can you still call yourself an assassin?)

[Armed Agent class-change error: “Flesh Armament.” The character template can evolve into all kinds of biotech weapons made from flesh!]

(Player: Why does this thing look like it belongs in a completely different game?)

Only after I’ve bulldozed my way up the wrong path to the summit do I discover that the steps beneath me lead nowhere!

Because I don’t leave a single bone behind!!

(The synopsis doesn’t do it justice. Please read the actual story!)

(Some parts are rather horrifying, so please be prepared!)

(The protagonist’s mental state will become unstable as the story progresses. Don’t imitate him!)