Doomsday Zombies: The Killer Saves the World

[Apocalyptic zombies + no System + not reborn + no harem + squad development + powerful protagonist + ruthless and decisive + military]

An unknown virus spreads, and zombies run rampant across the globe.

Xiao Shan was once an assassin. To save his infected younger sister, he fights his way through the apocalypse once more.

As time passes, people with supernatural abilities begin to awaken.

Xiao Shan awakens a Transcendent ability that lets him absorb the powers of other ability users.

Zombies evolve and mutant beasts rise. What will become of humanity?

Note: This book does not downplay the military's role in the apocalypse. The nation remains the foundation of survival.