Chapter 1: Welcome to the Grimdark
Warhammer 40,000.
A universe no sane traveler would willingly enter. A place where every known race twists the familiar into something utterly alien.
Towering warriors clad in ceramite power armor wield chainswords and power fists, cutting down foes like ancient knights of a cursed age.
Orks—green-skinned monstrosities—spawn from genderless fungal growths, bred purely for endless war.
Eldar, more agile and resilient than any human, their bodies honed to superhuman precision. Some can crush a man with a single limb.
And then there are the Necrons: they may resemble undead horrors, but they're anything but mystical. They are a cold, hyper-advanced machine race whose technology operates under the purest laws of physics.
Anyone familiar with traditional fantasy might do a double-take. "What...?"
But this is Warhammer 40K.
In this dark and distant future, humanity wages ceaseless war against xenos and daemons alike.
Ten thousand years have passed since the Emperor's Great Crusade was shattered by the Horus Heresy.
In the aftermath, the Imperium spiraled into dogma and superstition. What was once the Emperor's grand vision became twisted into a state religion, ushering in an age of stagnation and fanaticism.
Now, in the 41st millennium, the galaxy is torn in two by the Great Rift—splitting the stars into Imperium Nihilus and Imperium Sanctus.
And on the far edge of the galaxy, on a nameless world near the northeastern fringe… something awakens.
Soon, all who come to know of this place—human, ork, eldar, necron alike—will call it one name:
Planet Godzilla.
The reason is simple.
He rules it.
Even the Emperor of Mankind, entombed on the Golden Throne, found his thoughts drifting as psychic echoes from the planet reached him.
"Godzilla..."
And for a moment—however brief—the Master of Mankind felt something disturbingly close to fear.
This is where the story begins.
A deep roar echoed through the air.
Godzilla stared at the holographic interface hovering before him, tail twitching in irritation.
"This has got to be a mistake!" he growled, voice rough and strangely articulate for a creature of his size. "Warhammer 40K? You said Terra—I thought you meant that Terra!"
[Correct. Holy Terra.]
"I thought it was Terra from Arknights! I was already thinking about how to greet that old crone, Kelsey! This... this is Warhammer 40K! Do you know how nightmarish this universe is?"
[But... you're Godzilla.]
"That doesn't help!"
With a stomp of his foot, the earth quaked. Dust billowed.
"This place is the worst! It's tragedy turned up to eleven! There's no peace, no love, barely any women! Even other isekai protagonists would pass on this nightmare!"
[You're still Godzilla.]
"Spare me! Just look at my stats!"
[Name: Godzilla (First Generation)]
[Height: 50 meters]
[Weight: 20,000 tons]
[Abilities: Atomic Breath, Close-Quarters Combat]
"Sure, I can rip apart a few squads or take down a Primarch if I'm lucky. Maybe even go toe-to-toe with a Titan. But once the orbital bombardments start—or, Emperor forbid, a Chaos fleet warps in—I'm toast!"
[On the bright side, you have a 'Godzilla Full-Form Experience Card (1 Hour)' in your inventory.]
"...Wait. That includes—?"
[Yes. Including, but not limited to, Singularity Godzilla.]
Godzilla froze.
"...Alright, that's something."
The initial panic subsided. He flicked his tail, confidence growing.
Because in that single card lived power beyond comprehension. Snow Godzilla, Hell Godzilla, and Singularity Godzilla—forms capable of challenging gods. Even the Ruinous Powers of the Warp wouldn't dare take on Hell Godzilla lightly. And Singularity Godzilla? That was a being who could reset reality itself.
"Okay, okay, that's good. That gives me a fighting chance. I just have to earn more forms over time, right?"
[Exactly.]
"Then let's get started. What's the mission?"
[You sure? You don't want to relax first?]
Godzilla gave a low snort. "You ever seen a pig run? No? Post the damn mission."
[Mission: Survive.]
[Mission Description: In the grim darkness of the far future, Godzilla awakens on an uncharted planet. The reasons are unclear—perhaps the legacy of SpaceGodzilla, or cells scattered through a wormhole. Regardless, Godzilla is here.
Now, the planet faces dual threats: a Tyranid Hive Fleet descending from the void, and an Imperial armada from Ultramar responding to intercept. Will Godzilla be consumed... or become a threat even the Hive Mind fears?]
[Mission Rewards:
— 10 points per Tyranid Hive Tyrant eliminated
— 50 points per Hive Ship destroyed
Note: Kills made while using the Experience Card do not count toward rewards.]
"Cheeky loophole," Godzilla muttered. "Without that rule, I could've solo'd the Hive Mind in an hour."
[Exploit abuse may result in a ban. Just earn your strength like everyone else.]
"Fine."
With a thundering step, Godzilla roared skyward—his bellow echoing across the land.
The sound drew attention immediately. Both Tyranid ground swarms and Ultramarines in drop pods turned toward the source.
A battle-brother in blue power armor froze as he caught sight of the towering beast in the distance.
"By the Throne..." he breathed, voice trembling over the vox.
"What is that?"