From the Start, I Bound Myself to the Invincible, Rampaging Bruiser System

(Apocalypse + System + No Torturing the Protagonist + Decisive and Ruthless + No Saintly Do-Gooder)

The apocalypse arrives. After a torrential rainstorm, zombies overrun Blue Star and monsters descend upon the world! To survive, you have to keep killing zombies and monsters. Ye Xingchen, whose soul has crossed over from Earth, is bound to the Invincible Berserker System and awakens his first innate ability: lightning! By killing zombies with the System's help, he grows stronger and stronger.

While everyone else cowers in fear of the zombies and monsters, he's already chasing zombies down and hacking them apart!

While people fight over every scrap of food, even betraying their own families, he's already...!

With the System's help, the zombies and monsters of the apocalypse tremble beneath his feet!