The Dark Gate?

A Lone Strongman, a Darling of the Darkness

Building a Faction with Lots of Different Departments

A Ruthless, Overpowered Male Lead Who Has Everything Under Control

Looking for books like *Absolute Control: The Villain Must Be Refined*. Are there any similar books? I really love this kind of male lead.

Looking for an Apocalypse Story Where the Main Character Has an Army and Gives Survivors Hope

A Modern World Transformed, Where the Protagonist Founds a Mysterious and Powerful Organization

Something set in the modern day, where monsters or supernatural powers suddenly appear, and the protagonist creates an organization or company that's both mysterious and powerful.

A System, Creating Your Own Organization or Faction, and Becoming Powerful

Not a self-sacrificing do-gooder.

The Protagonist Plays the Leader of a Dark Organization, Wearing a Cool Mask. No Romance.

Stories with a Male Lead on the Dark Side

Looking for Sci-Fi: Transmigration, Civilization, Technology, and Empire

The protagonist is the emperor of a civilization and leads his empire into an interstellar war for supremacy.

The Protagonist Returns to Earth With a Powerful Force

Books where the protagonist becomes invincible in another world, then returns to Earth with their own faction.

The Protagonist Controls a Mysterious Organization That Seals Off an Area for Experiments

Stories Where the Protagonist Returns to Earth with a Fleet of Starships and Shows Off His Power

Any books where the protagonist starts out with a bunch of newly acquired stuff, returns to Earth, then shows off their high-tech weapons and gives everyone a good thrashing? Please, I'm begging you!

Invincible Stories With No Female Lead and No Romance

Looking for a Book With a Decisive, Ruthless Main Character Who Isn't a Goody-Two-Shoes or Dragging Along a Harem

Just these three things are enough.