Hellfire

"It has spread.

A disease contained in a medical research facility has escaped, known by those who lived long enough to name it as the Hellfire Virus. In a desperate attempt to eradicate the Hellfire, The Termination Crew set up major Quarantine Zones-All of which were destroyed from both insiders and out. Those that we couldn't save were laid to rest in their final spot. Those we could were safely relocated.

The Remaining Zones were renamed as The Deadlands, and were overrun by Bandits, Rouges, and anybody else willing to risk the Hellfire. While a Contaminated Area isn't the best place to send an Agent like you, we know you can do it. You have to fix this, stop every single Rioter before there's too many. The most important thing, though, is that we find the ones who released this thing.

'Cause I'll be damned if I have to see my children die because of them, Agent."