He was reborn as a German company commander, but led his troops in a mutiny an hour before the armistice.

He changed his mind about the assassination attempt, saving the revolutionary heroine, Rosa, from peril.

He founded the "Red Front," becoming the Nazis' most feared enemy.

"I'm not here to join history, I'm here to rewrite it."

—Karl Wegner

In 1918, desperate Germany wept. A spirit from the future brought it the only answer.

This is an unimaginable path, an epic tale of ideals and iron will.

The path has been shown.

Travel back in time to 19th-century Greece and witness his rise from a small Balkan nation. Lead Greece to its great ideals, restore the glory of Rome, and make the name of "Rome" known from Ireland to Khitan! And this is Constantine, the only sun of the Balkan Peninsula, the heir of Komnenos, the second Aristotle, the world's restorer, the Turkic butcher, and the loving father of the Roman people: Rome has only one chance to be revived. If you don't seize it, then let me do it!

1855, this is the best of times, the extended railway, the roaring locomotives, the flowing gold built the towering Tower of Babel; this is the worst of times, in the dark shadow of the Tower of Babel, the North and the South are in opposition, the gap between the rich and the poor is huge, and the weak are preyed upon by the strong. If you don't want to stay in the shadow of the Tower of Babel and be trampled on by others, you must climb to its glorious top and step on everything. In this era full of noise and commotion, the dark...

Tsar Peter the Great of Russia, Augustus the Strong of Saxony, King Christian of Denmark, Frederick I, the "Soldier King" of Brandenburg... Across the European continent, countless enemies aimed to crush the hegemony of the Swedish Empire. In the face of powerful adversaries, the Swedish King Karl XII—who hails from a future era—tells his soldiers: "Victory or death."