I’m an Ex-Developer, and Now I’m Developing Earth’s Destruction

Ji Changha was once the world’s greatest Hunter.

As the captain of the EX-Rank Subjugation Force, he fought on the front lines, led humanity through its darkest days, and ultimately closed the final Gate that threatened to destroy Earth.

His reward?

Betrayal.

Stripped of his abilities, sealed with nails, and thrown into the depths of the ocean, he spent ten years trapped in darkness while the world celebrated a hero it believed was dead.

But when an unexpected System notification grants him two extraordinary abilities Dungeon Developer and Monster Developer everything changes.

A former game developer now possesses the power to create dungeons, design monsters, and rewrite the very rules that govern them.

And as he returns to a world that has moved on without him, one question remains:

Who betrayed the hero who saved humanity?

This time, Ji Changha isn’t just clearing dungeons.

He’s developing them.