The end of the world didn't come with a declaration of war; it arrived as a quiet, toxic downpour.

Deep underground, the biotechnology conglomerate Aegis Vanguard had been playing god. Their black-project, "Strain Ouroboros," was designed to be the ultimate biological weapon—a synthetic parasite engineered to forge an army capable of instantaneous, violent adaptation to extreme environments and fatal trauma. But an act of catastrophic sabotage shattered that illusion. A massive subterranean explosion forcefully ejected the volatile parasite into the atmosphere, seeding the storm clouds with weaponized spores. The resulting rain poisoned the soil, the air, and the water tables of every major metropolitan area. In a matter of weeks, human civilization collapsed under the weight of a rampant, mutating plague.

Now, the towering, spore-choked ruins of those once-great cities were simply designated as the Red Zone. It was a terrifying biological nightmare, completely cordoned off from whatever remained of the sane world. But where there was extreme risk, there was astronomical profit. Shadow Company wasn't deployed to save the world; the elite PMC was there to secure highly classified Aegis Vanguard research files left behind in ground zero.

Miles away from the suffocating air of the quarantine sector, bathed in the pale blue glow of multiple surveillance monitors, Oz watched their every move.

Through the static-laced helmet cameras, the tactical formation was flawless. Maintaining strict noise discipline and meticulously sweeping their clock directions at every blind corner, the strike team pushed deeper into the decaying urban landscape. Commander Phillip Graves took the absolute front, his suppressed rifle raised as he led the vanguard alongside the heavy-hitting presence of Lerch and Mace. Meanwhile, the secondary feeds showed the flanking element sliding silently through the adjacent, debris-choked alleyways—a heavily armed sweep anchored by the towering, silent juggernaut known as Velikan. They were marching straight into a parasitic hell, but for Shadow Company, the monumental payout made stepping into the nightmare entirely worth it.