Blackstone City: From the Start, I Unlocked the Differential Engine

Lin Feng, a veteran soldier, transmigrated to the Black Iron Era and became acting lord of Blackstone City, a fallen border town.

Outside the city, the Red Ghosts’ molten-iron mechs advanced like mountains, while the priests’ psychic shrieks tore through the sky.

Inside, only three hundred battered soldiers remained. Their mechs were destroyed, and the differential engine was on the verge of shutting down.

At the brink of despair, the War God System activated.

[Kill a Red Ghost elite and obtain blueprint: Steam-Powered Exoskeleton]

[Destroy a command mech and unlock technology: Psychic Interference Module]

[Successfully hold the line and summon: 21st-Century Special Operations Squad]

Just as the Red Ghost army thought the city was about to fall, they saw this:

The three hundred battered soldiers donned exoskeletons and became steel reapers, carrying out textbook-perfect hunts through the alleyways.

In the city’s high tower, the steam differential engine roared at overdrive. What it fired weren’t shells, but “logic viruses” that analyzed the weaknesses of everything they touched.

And Lord Lin Feng stood atop the towering wreckage of a steam mech, with blueprint projections spreading out behind him and covering the entire city.

“Welcome to my Iron Age.”

This is a war of industrial gears and flesh-and-blood sacrifices,

and a case of modern military thinking delivering a dimensional beatdown to a steampunk world.

Hardcore steampunk + professional military tactics + an overpowered System story. Focused on steel, gears, differential engines, and how modern tactics crush all the flashy nonsense. Not mindless wish fulfillment: the story values logic and worldbuilding. Picky veteran readers are welcome.