A Wolfenstein-ish AU and a parital ISOT story idea I have but lacking the time and motivation to make it into a full fledged story.

Basic idea is Kallen Kozuki a year after the Zero Requiem finds herself thrown into a different world with her incomplete Guren Type Special lacking its EWS, and lacking much idea on how she got here in the first place. Finding herself working with the Black Knights of this world against a tyrannical power greater than Britannia and meeting familiar yet strange faces. Particularly working with an alternate Lelouch who is similar yet different to the Lelouch she loved, and this one mourning his Kallen who lost her life months prior. All the while fighting together against the Nazis and the Japanese Empire, the former indirectly or influenced by a mysterious supernatural organization.

The year is 1980 CE. The world has changed much over the past decades since the start of World War 2 and the rise of the greatest tyrannical entities to ever walk upon the world.

In the western hemisphere, the Grand German Reich dominates much of the world having conquered all of Europe, USSR, Northern Africa, half of North America, much of the Middle-East, and portions of South America. Their dreams of a supreme Aryan Lebensraum and ridding the world of impure races from existence fueling their industries of war that gave birth to countless technological marvels, particularly the Knightmare Frames. Already, many countries were brutally subjugated by their merciless onslaught as countless people deemed 'impure' exterminated in the millions. Entire cultures and ethnic groups wiped out in vast Concentration camps.

In the eastern hemisphere, the Empire of Japan in their gluttonous drive for conquest march forth in expanding their empire to create the Grand Asia Co-Prosperity Sphere – where all of Asia is under Japanese control. A false concept that's nothing more than a sham to justify Japanese supremacy by the Imperial Military and Nationalists, who're controlling all aspects of Japanese life. Millions everyday are oppressed by the merciless soldiers of the Imperial army as cultures and dignity of many lands are slowly stripped away and trampled upon. Even now, the armies of the Grand German Reich continue to march into war against the remaining countries in South America and the rest of Africa. While Japan continues on forth in subjugating the rest of China while plans for the future invasion of Australia are being made.

Yet, even as they're bathed in an aura of invincibility and power, cracks within the two factions are starting to appear and expand as the constant allocation of resources into war is starting to take its toll upon them. Along with ever fierce resistance from the remaining free countries fighting for their very existence, and resistance groups in various countries becoming ever more powerful in their attacks. Especially those who managed to construct or obtain their own Knightmare Frame designs.

All it needs is the spark of hope that would ignite the fires of resistance and reign hellfire upon the Grand German Reich and the Empire of Japan as if the final judgement was at hand. The Beast that will rise from the darkness to slay the Whores of Babylon.

And it starts with a seemingly insignificant group of upstarts within the former USA now known as the Reich America Zone. Along with an unexpected outsider not of this world.

Unknown Location

"Burn!" Kallen yelled as she pressed the joystick button that unleashed the radiant surge claw's full power. Burning the unknown knightmare she had in her grasp before releasing the doomed KMF as it quickly bubbled and exploded.

Kallen had no time to take in the explosion as she quickly somersaulted her KMF back to avoid a barrage of gunfire coming from some distance away. Landing back on her feet to see more of the unknown dark grey knightmares appear around the corner of a dilapidated building of the ghost town she was fighting at. They were the same models she fought a moment ago whose remains lay scattered about either slashed apart or melted with radiant energies.

Their overall design was bulky and heavily-armored, reminiscent of the iconic gas-masked European stormtroopers of the Great War of Europe that fought in the trenches. Its noteworthy design features being its spiked shoulder pauldrons which gave a intimidating armoured appearance and a gas-masked head that was somewhat goofy and imposing. Most of them yielded some sort of rifle/lance hybrid that wouldn't be out of place in Britannia, while others carried with them a bazookas. One of them blared out something that sounded like German which she couldn't understand, but probably some sort of profanity or orders to 'surrender' herself.

Not that mattered when all of them fired upon her as hundreds of bullets and shells rained upon her. Kallen pushed her partially incomplete Guren Type Special into action avoiding the enemy fire with the mobility expected of her unit, dancing their attack before she fired off her radiant wave beam and burned through two hostile units. Causing them to bubble and explode soon afterwards. Resulting in the enemy formation seemingly fell into panic as the rest scattered in response to the long-range radiant beam fire. They continued on firing their weapons in a futile effort at the highly advanced Guren, missing their shots or getting an accurate target lock on it. Who then launched its shoulder harken boosters and ripped apart another enemy KMF. Two more charged at her with their lance guns ready to pierce through the red knightmare. But Kallen had her KMF charge straight at them and swiftly slashed across their torso with her MVS knife, and she could see she hit their powerplant when the two collapsed and exploded.

She then fired off a few more radiant discs at two more enemy knightmares. One enemy unit barely managed to dodge the radiant discs, pushing its landspinners at full power to avoid it ripping its right arm. While the other two behind it weren't as fortunate as their KMFs were ripped apart by the discs. The lone survivor tried to avenge his comrades with a harken launched from its chest at the Guren's head, however Kallen managed to bring her MVS knife out and tangle the wires with her blade. She then launched her radiant claw at the enemy knightmare where it soon grasped its head before unleashing the full power of the radiant surge claw. Pumping in a large amount of radiant energy into it before the claw retracted back to the Guren, and the enemy KMF quickly bubbling and exploded soon after.

Her sensors beeped to warn her few more remaining hostiles coming from her rear, causing her to turn and three more enemy units charging in. Two were holding assault rifle and grenade launcher combos, and the last unit holding a sword. Before Kallen could make the decision on how to deal with the three, one of the units found itself ripped apart by a barrage of gunfire from nowhere. Causing the other two to face where the direction where the attack was originating from, and over a hill Kallen saw a unknown black and gold knightmare frame rollover at speeds comparable to that of elite 7th-generation units. A KMF design that her camera captured which was an unfamiliar design which roughly reminded her of the Lancelot though with a Britannain helmet-like head.

Kallen Kozuki watched as the new knightmare frame swiftly evaded the sword-wielding KMF's slash. The knightmare then drew out what appeared to be a MVS blade and cut off the enemy's sword and right arm apart. It then dashed forward at high speed and swung its blade to bisect the KMF's torso apart. The attack caused the bisected KMF's power drive to become unstable and engulf the bisected parts in an explosion typical of a Yggdrasil drive. The knightmare frame then ducked down to avoid the slash harken of the last remaining enemy unit, now desperately firing its grenade and rounds. The more advanced unit weaved through the gunfire and soon somersaulted over the grey knightmare, drawing out its own assault rifle and fired at the enemy's cockpit – leaving it to fall lifelessly on the ground with its devicer dead.

The incomplete Guren then found itself staring at the unknown, advanced knightmare frame who turned around to look at her. Both of them are surrounded by the ghost town and the remains of the unknown enemy they fought against.

From the distance several more units joined in, but unlike the hostiles they fought against, these ones were somewhat similar to the one in front of her; but blockier and seemingly less advanced, holding rifles, bazookas, and blades. Each of them customized in different colors and decorations. Along with all of them aiming their weapons at her making her tense for a upcoming fight.

"I don't know who you are, but I'm finding myself wondering why a Japanese knightmare is killing its allies unless the Reich and the Empire is already backstabbing each other." Kallen froze in shock when a very familiar voice blared out from the unknown KMF's speakers. It couldn't be him, he was dead for over a year ever since that day… "Since I'm willing to give you a chance to explain yourself, why don't yo–." The speaker was cut off when Kallen blurted out.

"Lelouch… Is that you?" Kallen Kozuki's heart clenched in anxiety and hope.

The question had the black KMF to freeze in shock as well as the other KMFs behind it, stunned by her voice for some reason. It briefly raised its weapon before putting it down.

For some reason, Kallen found herself deciding to open her cockpit and stand up from it to show herself. The Guren Type Special's cockpit hissed as the cockpit opened up and the redhead slowly rose up from her seat like a dragon rising to show its majestic glory. Looking into the very eyes of the sleek knightmare frame before her as its own cockpit block opened up.

Her breath hitched and eyes widening when the devicer stood up to reveal himself to her. A familiar young man with raven hair and purple eyes, who had a thin yet strong figure that he didn't fully have before. And dressed in some sort of pilot suit colored in black and gold. There was something about him that was somewhat different: the one in front of her lacking the aristocratic aura or the cold, cunning mind that was evident through his purple eyes.

"Lelouch…" She found herself whispering.

"Kallen?" He whispered, voice and eyes quivering as if he couldn't believe what he was seeing. As if he was looking at a ghost.

5th-gen EiR-2 Ritter II KMF = based off the Den'an Zon MS from Gundam F91

5th-gen GAI-05 Jefferson = M6 Bushnell from Full Metal Panic

8th-gen GAI-23 Minutemen = M9 Gernsback from Full Metal Panic