Shadow Company (mutation)

The end 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. It was meant to be controllable. 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 that rapidly warped flesh and consumed everything it touched.
Now, the towering, spore-choked ruins of those once-great cities are designated as the Red Zone. It is a terrifying biological nightmare, completely cordoned off from whatever remains of the sane world.
But where there is extreme risk, there is astronomical profit.
Moving with absolute tactical precision through the decaying, overgrown streets, the operators of Shadow Company advanced. Maintaining strict noise discipline and meticulously checking their clock directions at every blind corner, the PMC strike team pushed deeper into the quarantine sector. They weren't there to save the world or hunt the infected. They were there for the payload: highly classified Aegis Vanguard research files left behind in ground zero.
The threat of an agonizing death at the hands of Ouroboros mutations was terrifyingly high, but for the Shadows, the monumental payout made stepping into this hell on earth entirely worth it.